MUTEC MC-4 User Manual

ADATTM– AES3 – S/P-DIF DIGITAL AUDIO FORMAT

AND SAMPLING RATE CONVERTER

SAFETY INSTRUCTIONS

General instructions To reduce the risk of fire or electrical shock, do not expose this appliance to rain or moisture, direct sunlight or excessive heat from sources such as radiators or spotlights. No user serviceable parts are inside. Repair and maintenance must be carried out by qualified personnel authorized by MUTEC GmbH! The unit has been designed for operation in a standard domestic environment. Do NOT expose the unit and its accessories to rain, moisture, direct sunlight or excessive heat produced by such heat sources as radiators or spotlights! The free flow of air inside and around the unit must always be ensured.

CAUTION

RISK OF

ELECTRICAL SHOCK!

Initial operation

Prior to the initial operation of the unit, the ap pliance , its accessories and packaging mu st be inspected for any sign s of physical damag e that may have occurr ed during t ransit . If the uni t has been da maged me chanic ally or if li quids hav e been spi lled ins ide the enclosure , the appliance may not be co nnected to the mains or must be disco nnected from the mains imm ediately! If the unit is damag ed, plea se do NOT re turn it to M UTEC Gmb H, but not ify your dealer an d the shipp ing company immediate ly, other wise cl aims for damage or replacem ent may not b e granted.

If the device is left in a low-temperature environment for a long time and then is moved to a roomtemperature environment, condensation may occur on the inside and the exterior. To avoid shortcircuits and flashovers, be sure to wait one or two hours before putting the device into operation.

Power supply The device contains a self-adapting wide-range power supply supporting the majority of global standard line voltages within a range of 90…250 V, with no need for making adjustments. Make sure that your line-voltage source provides a supply voltage within the specified range. In addition, make sure that the device is properly grounded via the local electric installation.

Pleas e use the enclose d power cord (see pa ckaging) to connec t the unit t o the mains . Switch the unit of f before y ou attempt to conn ect it to t he mains . Connec t the power cord to the unit, th en to a standard 3- pin main s outlet . To draw the po wer cord, n ever pull o n the cabl e but on the m ains plug!

The uni t must be g rounded during op eration!

For information on the power-inlet wiring, refer to the »Wirin g of connectors« section in the appendix. Disconnect the device from the mains when not using it for an extended period!

Declaration of Conformity We herewith confirm that the product complies with the European Commission’s standards on electromagnetic compatibility.

Interference emission: EN 50081-1, 1992 Resistance to interference: EN 50082-1, 1992

Presupposed as operation condition is that all clock outputs are connected with high-quality and good shielded BNC 75 ohms cable.

This symbol, a flash of lightning inside a triangle, alerts you to the presence of uninsulated dangerous voltage inside the enclosure - voltage that may be sufficient to constitute a risk of shock.

This symbol, an exclamation mark inside a triangle, alerts you to important operating or safety instructions in this manual.

WARRANTY REGULATIONS

§1 Warranty

MUTEC GmbH warrants the flawless performance of this product to the original buyer for a period of two (2) years from the date of purchase. If any failure occurs within the specified warranty period that is caused by defects in material and/or workmanship, MUTEC GmbH shall either repair or replace the product free of charge within 90 days. The purchaser is not entitled to claim an inspection of the device free of charge during the warranty period. If the warranty claim proves to be justified, the product will be returned freight prepaid by MUTEC GmbH within Germany. Outside Germany, the product will be returned with the additional international freight charges payable by the customer. Warranty claims other than those indicated above are expressly excluded.

§2 Warranty transferability This warranty is extended exclusively to the original buyer who bought the product from a MUTEC GmbH specialized dealer or distributor, and is not transferable to anyone who may subsequently purchase this product. No other person (retail dealer, distributor, etc.) shall be entitled to give any warranty promise on behalf of MUTEC GmbH.

§3 Waranty regulations The return of the completed registration card, or online registration on one of the websites specified below, is a condition of warranty. Failing to register the device before returning it for repair will void the extended warranty.

The serial number on the returned device must match the one stated on the registration card or entered during online registration. Otherwise, the device will be returned to the sender at the sender’s expense. Any returned device must be accompanied by a detailed error description and a copy of the original sales receipt issued by a MUTEC dealer or distributor. The device must be returned free of shipping expenses and in the original package, if possible; otherwise, the sender has to provide comparably protective packaging. The sender is fully responsible for any damage or loss of the product when shipping it to MUTEC GmbH.

§4 Limitation of warrant y Damages caused by the following co ndition s are not cov ered by thi s warrant y:

Damages caused by ever y kind of normal wear an d tear (e.g. display s, LEDs , poten tiometers, faders, s witches, but tons, connec ting ele ments , printed labels , cover glasses, cover prints, and similar parts). Functional failure of the product caused b y improp er inst allation (pleas e obser ve CMOS compone nts handling instructi ons!), neglect or misuse of the pro duct, e.g. failu re to opera te the unit in compliance with the instr uctio ns given in the user o r service manuals. Damage caused by any form of e xtern al mechanical imp act or mo difica tion. Damage caused by the user’s failure to connect and operate the u nit in comp liance wi th local s afety r egulati ons. Damage caused by force maj eure (fir e, explo sion, flood, lightning, war, vandali sm, etc .). Consequenti al damage s or defects in pr oduct s from other manufacture rs as well a s any cost s resulting from a l oss of pro ducti on.

Repair s carri ed out by pe rsonnel which is n ot authorized from MUTEC GmbH will void t he warranty. Adaptations and modifications to the device made with regard to national, technical, or safety regulations in a country or of the customer do not constitute a warranty claim and should be set with MUTEC GmbH in advance.

§5 Repairs To obtain warranty service, the buyer must call or write to MUTEC GmbH before returning the unit. All inquiries must be accompanied by a description of the problem and the original buyer’s invoice. Devices shipped to MUTEC GmbH for repair without prior notice will be returned to the sender at the sender’s expense. In case of a functional failure please contact:

MUTEC Gesellschaft fuer Systementwicklung und Komponentenvertrieb mbH

Siekeweg 6/8 • 1230 9 Berlin • Germany • F on 030 -74688 0- 0 • Fax 030 -74688 0-9 9 • Tecsuppo rt@MUTEC-net.com • www.MUTEC-net.com

JET and Jitter Elimination Technology are trademarks of TC Applied Technologies Ltd. The JET technology is used under sublicense from TC Applied Technologies Ltd., and is the intellectual property of Sonopsis Ltd. Applicable patents include WO2004088845.

MUTEC GmbH assumes no liability for any incorrect information given in this manual. Please note that all software/hardware product names are registered trademarks of their respective owners. No part of this manual may be reproduced, copied or converted to a machine-readable form or electronical media without a written permission of MUTEC GmbH. We reserve the right to change or improve our products without prior notice. © MUTE C GmbH 2012

CONTENT

INTRODUCTION

General Function Description . . . . . . . . . . . . . . . . . 7

MC-4 Features . . . . . . . . . . . . . . . . . . . . . . . . . 7

MC-4 Applications . . . . . . . . . . . . . . . . . . . . . . . 7

Peripheral MUTEC Products . . . . . . . . . . . . . . . . . . 8

CONTROL ELEMENTS AND TERMINALS

MC-4 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . 9

MC-4 Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . 9

INSTALLATION

Content of the Box . . . . . . . . . . . . . . . . . . . . . . . 11

Placing the device . . . . . . . . . . . . . . . . . . . . . . . 11

Wiring the optical ADAT

Wiring the Word Clock Interfaces . . . . . . . . . . . . . . . 11

, AES/EBU and S/P-DIF Interfaces . 11

GENERAL OPERATION

Selecting Function Menus and setting Functions . . . . . . 13

Steps of Operation . . . . . . . . . . . . . . . . . . . . . . . 13

OPERATING THE MC-4

MODE + AUDIO IN + REFERENCE Menus . . . . . . . . . . . . 15

General Operation Procedure . . . . . . . . . . . . . . . . . 15

Unidirectional Format Conversions . . . . . . . . . . . . . . 16

Unidirectional Format and Sampling Rate Conversions . . . 17

Bidirectional Format Conversions . . . . . . . . . . . . . . . 18

Bidirectional Format and Sampling Rate Conversions . . . . 19

X-SRC Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

STATUS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

CLOCK

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

APPENDIX

Pin Assignment of the Connectors . . . . . . . . . . . . . . 23

Technical Data . . . . . . . . . . . . . . . . . . . . . . . . . 24

BEDIENELEMENTE

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INTRODUCTION

Thank you very much for purchasing the MC-4, Digital Audio Format and

Sampling Rate Converter, from MUTEC!

General Function Description

The MC-4 is an extremely flexible, high-performance digital audio format and sampling rate converter for ADAT audio signals can be processed with 8 channels and sampling rates up to

192.0kHz, whereas unidirectional and bidirectional conversion modes are available. Based on latest FPGA designs, the MC-4 achieves levels of performance regarding its signal quality, unique flexibility, clocking features and the 16 channel sampling rate conversion engine (SRC), which are outstanding in today’s industry!

Various operation modes enable the use of the MC-4 in many studio setups. Generally, incoming digital audio signals are converted to all three audio formats simultaneously, with or without SRC functionality. The SRC engine can be locked to Word Clock, AES11 and any digital audio input in both, unidirectional and bidirectional operation modes.

Furthermore, the MC-4 offers an internal, low-jitter clock base with high accuracy to which the SRCs can be locked to, if no external reference is available. This enables to run the MC-4 in set-ups where no separate master clock is available. Furthermore, in this operation mode the MC-4‘s Word Clock output supplies a low-jitter reference clock signal which is of same high accuracy as the internal clock base. This can be used e.g. as master clock reference for the whole studio.

This all makes MC-4 for sure a unique and the most flexible digital audio multichannel converter in a ½ 19“ case currently available in the market!

MC-4 Features

ADATTM, AES/EBU and S/P-DIF interfaces in one box.

Bidirectional format and sampling rate conversions from 32.0 kHz to 192.0 kHz.

Converts standalone and bidirectionally with different sampling rates: X-SRC Supports ADAT

Signal improvement through low-jitter clock recovery. AES11, Grade 1, internal reference clock. Low-jitter Word Clock output can be used as master clock reference. Runs standalone without needing an external clock source. 16 channel SRC engine for bidirectional conversions. Extremely flexible synchronization options.

Continuous signal supply in absence of the reference audio or clock signal

Separate AES11 reference clock input. Simultaneous conversions to all output formats. Easy configurable. User‘s settings will be stored after switching-off. Rack space saving ½ 19“ housing allowing for mounting two devices in one rack unit. Built-in international power supply.

, SMUX2 and SMUX4 standards.

, AES3 and S/P-DIF. All digital

The grey boxes contain supplementary informationen for the corresponding sections in the text columns. The content of the individual box refers to the description in the text column beside the box.

Boxes which contain a triangle with an exclamation mark inside should

be read carefully! These include additional information which are of major importance for the functional descriptions

in the text column.

for Warranty and Support!

We ask you to be so kind to register your MUTEC product through our website

immediately after purchasing. This ensures

full warranty services over a period of two

years after purchasing the product. More-

over, for all registered products we offer to

our customers technical support. We also

will inform you about product updates and new products which may of interest for you

(on voluntary base, of course).

Please regsiter your product at:

www.MUTEC-net.com

> SERVICES, > MUTEC Product Registration

MC-4 Applications

Interconnection of consumer and professional digital audio devices.

ADAT

+ SMUX2 /4, AES3 and S/P-DIF format and sampling rate conversions. Integration of non-synchronizable devices into digital studio environments. Clock recovery and digital audio signal regeneration. Realtime bidirectional signal transfer between send/returns of digital mixing consoles and effect processors. Unidirectional or bidirectional interconnection of computer-based sound cards with professional digital audio equipment.

ADAT

signal splitting and distribution. Usable within small studio set-ups up to broadcast installations.

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INTRODUCTION

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Peripheral MUTEC Products

Reference Clocks and Master Clocks for Synchronization:

iCLOCK + iCLOCKdp iCLOCK and iCLOCKdp are synchronizable, high-precision clock generators which are designed to be the reference in digital audio and video studios as well as broadcast and television stations. For further details please visit:

www.iCLOCK-net.com

MC-3 The MC-3 SMART CLOCK is an universal digital audio master clock generator. The unit provides different high-stable and Ultra low-jitter clock signals for synchronization of various digital audio devices.

MC-3.1 The MC-3.1 SMART CLOCK SD is an universal digital audio and SD video sync master clock generator. The unit provides different high-stable clock signals for simultaneous synchronization of digital audio and SD video devices.

MC-3.2 The MC-3.2 SMART CLOCK HD is an universal digital audio and SD/HD video sync master clock generator. The unit provides different highstable clock signals for simultaneous synchronization of digital audio and SD/HD video devices.

Signal Distributors

MC-2 The MC-2 is a high-performance digital audio and reference clock signal distribution amplifier and format converter for AES3/11 and AES3/11id signals.

MC-7 The MC-7 is a flexible, high-performance 8-channel Word Clock distribution amplifier and audio clock converter.

Cables for Digital Audio:

Optical cables in different lenghts from 0.5 m to 20 m for ADAT fers.

Multicore cable adaptors with 110Ω cable impedance and Neutrik connectors from 0.6m to 5m.

For all peripheral products please have a look on our website: www.MUTEC-net.com !

trans-

XLR

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BEDIENELEMENTE

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CONTROL ELEMENTS AND TERMINALS

MC-4 Front Panel

321

1 POWER This red LED lights up when the unit is switched on with the rear panel POWER switch.

2 MENU This key selects one of the available function menus.

3 SELECT Use this key to select a function within a specific function menu.

4 MODE This function menu allows to select all available conversion modes.

5 AUDIO This function menu allows to select the digital audio formats which should be converted with the previously selected conversion mode.

6 REFERENCE This function menu allows to select the master clock reference for synchronization of the selected format conversion mode as well as the SRCs.

7 STATUS This menu indicates various signal statuses of the incoming master clock reference signal and the digital audio signal as well as the SMUX coding of the ADAT

8 CLOCK This menu indicates the clock rates of the incoming digital audio signal or of the master clock reference signal.

output signal.

6 7 8

Refer to the chapter »OPERATIONS« for more information.

MC-4 Rear Panel

3 5

1 AES11 REF IN This input receives a balanced digital AES11 blank frame signal in compliance with AES11–1997/2003 as master clock reference for the SRCs. Alternatively, an AES3 digital audio signal in compliance with AES3 –1992 (R1997) or a S/P-DIF digital audio signal aligned to IEC60958 can be input. The input impedance is 110 Ω (XLR connector, female).

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2 4 6

For detailed specifications on all terminals, refer to the »Pin Assignment of the Connectors« and »Technical Data« in the chapter »APPENDIX«.

CONTROL ELEMENTS

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2 WCLK IN + OUT The above BNC connector (IN) receives a Word Clock or so-called »Super Clock« signal as master clock reference for the SRCs. The below BNC connector (OUT) transmits a low-jitter Word Clock signal based on the internal clock base or the selected external clock reference signal. If format conversions only are carried out, the WCLK output sends a Word Clock signal extracted from the selected digital audio reference signal. The impedances of both connectors are 75 Ω (BNC connectors, female).

OUT

3 ADAT These two optical inputs receive digital audio multichannel signals incompliance with the Alesis ADATTM format. Input »A« alone accepts ADATTM signals up to 50.0kHz. For receiving ADATTM signals with higher clock rates up to 192.0kHz, both inputs »A« and »B« are used simultaneously (ToslinkTM connector, EIAJ standard).

4 AES3 IN + OUT CHAN 1– 8 This interface receives and transmits 8 channels of AES3 digital audio signals each in compliance with AES3 –1992 (R1997). Alternatively, the 8 inputs can also be feeded with S/P-DIF digital audio signals aligned to IEC60958. The input and output impedances are 110 Ω. The pin assignment of the 25pin D-Sub connector complies with Yamaha, AKAI, Mackie and others, too.

5 ADAT These two optical outputs transmit digital audio multichannel signals in compliance with the Alesis ADATTM format. Eight channel ADATTM with up to 50.0kHz clock rate are sent to both optical outputs, enabling a signal doubling. For transfering ADATTM signals with higher clock rates up to

192.0kHz, both outputs »A« and »B« are used to split the ADATTM signal, as described on page 16, under »SMUX2 + SMUX4« (ToslinkTM connector, EIAJ standard).

6 S/P-DIF IN/OUT These interfaces function as receiver and transmitter for S/P-DIF digital audio signals in compliance with the IEC 60958 standard. Their function depends on the selected operation mode, which is displayed on the front panel. The impedances of all connectors are 75 Ω (Cinch connectors, female).

7 MAINS IN, Power Switch + Power Inlet This is the main switch for switching the device on and off. Be sure to make all connections (especially the supplied power cable) properly before turning on the switch. Heed the SAFETY INSTRUCTIONS at the beginning of this manual.

Connect the supplied power cable here. Make sure that the power switch is turned off before connecting the power cable to this inlet and to the power outlet. Line voltages within the range of 90…260V with a frequencies between 47...440Hz can be applied. The internal power supply will automatically make all necessary adjustments.

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BEDIENELEMENTE

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INSTALLATION

Content of the Box

The unit was packed carefully. Nevertheless we recommend to check the content directly after opening the package:

1 x MC-4 1 x Power cable 1 x Manual

Placing the Device

The unit should be set up as closely as possible to the devices to which it will be connected, so as to avoid excessive cable lengths. Use the 4 rubber feets enclosed with the appliance and stick them symmetrically on the bottom side of the unit to protect the enclosure and supporting surface from being damaged.

The device can be mounted into a standard 19“ rack and will require 1 unit. In this case, the rubber feet cannot be attached. Install the device so that one unit of rack space is left free both above and below the device to allow for sufficient ventilation! The mounting depth including the terminals is 160 mm/6.7“. Another 60 mm/2.4“ should be added for the required cables.

Additional slide-in rails on the rack inside are recommended for safe installation. This will also avoid long-term mechanical deformation of the housing.

The condition of the packaging material and the device should be checked carefully additionally. If there are any damages please refer to SAFETY INSTRUCTIONS, Initial Operation, and WARRANTY REGULATIONS.

Before installing the unit the section

SAFETY INSTRUCTIONS located at the beginning of this manual

should be read carefully.

Never expose the device and

accessories to rain, moisture, direct

sunlight, or excessive heat produced

by radiators, heaters, or spot lights! Sufficient air circulation in the environment of the device must be ensured!

Wiring the optical ADATTM, AES/EBU and S/P-DIF interfaces

ADATTM Connect the optical ADAT™ interfaces with the help of TOSLINK™-compliant optical fiber cables. Here, you can use both plastic and glass fiber-based cables. When using plastic fiber cables, lengths of 10 meters should not be exceeded, so as to ensure the reliable transmission of signals. Glass fiber cables can transfer data reliably even over greater distances.

AES/EBU Connect the AES/EBU interface with the help of an electrical 25-cond. cable equipped with 25-pin D-Sub connectors. The specifications stipulate a specific cable resistance of 110 Ω. When purchasing the cable ask your retailer for a confirmation that the cable will perform flawlessly in your specific application.

Connect the coaxial S/P-DIF interfaces with help of unbalanced electrical cables equipped with cinch connectors on both ends. The specifications stipulate a specific cable resistance of 75 Ω. Ask your retailer for a confirma- tion of this value when purchasing the cables.

Wiring the Word Clock Interfaces

To allow for the synchronization of signals, the interfaces of all devices involved must be properly connected to each other, so as to ensure a logical signal flow. Always be sure to connect the Word Clock output of the MC-4 to the corresponding input of the device you wish to synchronize. Cable lengths should be kept as short as possible to minimize signal losses and/or interferences!

For the transmission of Word Clock signals electrical, unsymmetrical cables with a resistance of 75 Ω and BNC connectors on both ends are used. Typi- cally, such cables are marked »RG-59U, RG59B/U«.

Additionally, you should make sure that the Word Clock input to be connected to the MC-4’s output have a 75 Ω terminating resistor! Most Word Clock inputs allow for enabling/disabling the termination with a so-called »termination-switch«, which may be located on the outside or inside of the device.

For devices which have no termination of the Word Clock input, e.g. RME Hammerfall with Word Clock i/o, Alesis BRC or M-Audio ProFire Light-

MUTEC offers optical cables of various lengths that have been specifically tested for the transmission of ADAT™ signals. Ask your local dealer for those cables!

We advise you not to buy 25pin D-Sub cables from your computer retailer! Even though such cables

may look similar to 25pin D-Sub AES/EBU

cables, they may be wired differently!

MUTEC assumes no liability for damages resulting from the use of improperly wired cables!

Especially when working with high AES/EBU

clock rates well shielded cables are imperative to avoid increased radiation! Standard cables are normally useable for clock rates up to

50.0kHz. Special shielded cable material

should be used for transfer of higher clock

rates.

Please make sure that the cable used has a resistance of 75 Ω! If a

cable with a different resistance is used, a dramatic deterioration of the signal quality can be the result! In this case, the

perfect synchronization could be impaired.

We recommend using high-grade cables with

a good shielding. A length of max. 10 meters (approx. 30 feets) should not be exceeded!

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INSTALLATION

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bridge, you can use an additional BNC-T piece to terminate the input. Plug the T piece with its center connector into the input of the receiving device. Then, connect the cable coming from the MC-4’s Word Clock output to one of the lateral connectors, and the other connector of the BNC-T piece to a 75 Ω resistor forming the BNC termination.

Basically, you should avoid »looping through« Word Clock leads by means of passive BNC-T pieces to preserve the signal quality, as level drops will be the result. If there is no other way to wire your set-up, please make sure that all Word Clock inputs (except for the last device in the chain) have their terminations disabled! In a serial Word Clock chain only the last clock input should have a termination! Never connect more than three devices in series to one output!

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BEDIENELEMENTE

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GENERAL OPERATION

Selecting Function Menus and setting Functions

The device is fully operated using the two toggle switches at the front panel.

1 Switching the »MENU« button toggles between different basic function menus. 2 Switching the »SELECT« button activtes individual functions within one function menu.

2. SELECT

Selects individual

1. MENU

function menus.

MENU + SELECT operation

Selects individual functions within one function menu.

and INSTALLATION chapters before first powering-up! We also recommend reading the CONTROL ELEMENTS AND TERMINALS chapter for information on how to connect the device!

Safety Instructions

For safety reasons, be sure to

read the SAFETY INSTRUCTIONS

Functions

Function Menus + Functions

Steps of Operation

1 First press on »MENU« or »SELECT« key enables the last selected function

within the last selected function menu. The corresponding LED is beginning to flash. 2 Every press on »SELECT« button selects a new function within a menu. The LED of the selected function flashs accordingly. After the LED stops flashing, the function is activated. 3 When the needed function is selected, do not press the switches again! After a period of approximately 4 seconds the LED of the selected function stops flashing.

The »STATUS« and »CLOCK »MENU« and »SELECT« keys, because they only inform about different conditions of incoming signals.

Menus

IN« areas are not accessible by using the

Shut-Down of Outputs

All digital audio outputs are shut-

down during function selection! After a function is finally selected and the corresponding LED lights constantly again, the digital audio outputs are activated for

signal transfer.

User Settings Remain

All user-specific function settings

are available furthermore when

power is restored.

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BEDIENELEMENTE

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OPERATING THE MC-4

MODE + AUDIO IN + REFERENCE Menus

These three function menus are offering access to the whole functionality of your MC-4.

The »MODE« menu allows to select the general conversion option as uni- or bidirectional conversion, with or without sampling rate conversion or the X-SRC mode.

Within the »AUDIO conversion. This menu acts in dependency of the »MODE« menu. The operating system makes sure that only useful combinations of conversion modes and proper audio formats are accessable. Therefore both menus act together in different combinations.

The »REFERENCE« menu provides all necessary synchronization options for the corresponding conversions modes and the use of the internal sampling rate converters (SRC). This menu also acts in dependency of the »MODE« menu. It is only directly accessable when a SRC mode is selected under »MODE«.

The menus »STATUS« and CLOCK status only. They are not accessable for adjustments.

IN« menu you select the digital audio formats for

IN« are for control of the MC-4‘s operation

General Operation Procedure

The MC-4 menu is strictly organized aligned to generally usual handling procedures when inserting such a box into your studio‘s data stream. So, you can split up all of the necessary adjustments in three steps, which leads to the following three questions for the basic operation of your MC-4:

1) What kind of conversion should be executed → MODE?

UNI-DIR = unidirectional conversion, from one format to all others

BI-DIR = bidirectional conversion, between two formats only

SRC = above mentioned conversions with SRC

X-SRC12 = crosswise conversion between two formats and clock rates

MODE

2) Which digital audio format(s) should be involved as source(s) → AUDIO

ADAT1 = ADAT

S/PDIF

SMUX21 = ADAT

SMUX4

= ADAT

AES3

= AES3 between 25.0kHz and 200.0kHz

AUDIO

* If both LEDs light in front of the ADAT sources for conversion.

3) Which clock source do I need for my prefered operation → REFERENCE?

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

up to 50.0kHz*

between 50.0kHz and 100.0kHz*

between 100.0kHz and 200.0kHz

and SMUX2 options, the S/P-DIF inputs function as audio

32.0

IN 1

IN 2

IN 3

IN 4

44.1

48.0

88.2

96.0

176.4

192.0

IN?

Continuous Clock Supply

When setting up your MC-4 for the

within the »REF CLOCK

first time, you will recognize that

»44.1«, under »1« lights constantly. This is

due to the MC-4‘s continuous clock supply

function.

REF CLOCK IN

When no input signal is available, the MC-4 supplies at all digital audio outputs blank frame signals, the Word Clock output carries a corresponding Word Clock reference

signal. Thus, connected devices receive

immediately valid clock signals at their appropriate inputs after starting up the whole

studio set-up. The initial clock rate of all outputs is 44.1kHz.

When loosing the external clock reference

signal during operation, the MC-4‘s PLL syn-

thesizer locks the internal reference clock

oscillator on the clock rate which is nearest to the lost one to provide stable reference

signals to the connected devices.

1 2

« menu the LED at

32.0

96.0

44.1

176.4

48.0

192.0

88.2

After these general decisions are made, your MC-4 is configured for optimal operation in your set-up! Due to the fact that the system monitors for useful function combinations, maloperation is not possible.

So, let‘s have a look to the individual functions on the next pages.

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OPERATION

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Unidirectional Format Conversions

Channel Assignment

The equal channel number assignment of the multichannel audio

streams is guaranteed in all operations

modes of the MC-4.

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

AUDIO IN

SMUX2

SMUX41 SRC

AES3

S/P-DIF

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

32.0

44.1

48.0

88.2

96.0

176.4

192.0

SMUX2 + SMUX4

The 8 channel ADAT

format uses standardly one optical connector and is limited to sampling rates up to 50.0kHz. To enable the use of higher sampling rates up to 192.0kHz, SMUX2 or SMUX4 processing must be activated separately because these formats are not decoded in the ADAT

data stream for

automatic detection.

The SMUX2 process splits the ADAT

stream into two 4-channel blocks. Thus, both optical inputs »A« and »B« must be used to input a full 8-channel ADAT

stream, whereas input »A« receives channel 1– 4 and input »B« receives channel 5 – 8. SMUX2 transmits ADAT streams with clock rates between 50.0kHz and 100.0kHz.

SMUX4 works equally to SMUX2. Due to the higher sampling rates, only 4 channels of an 8-channel ADAT

stream can be processed. Thus, the optical input »A« receives channel 1 + 2 and input »B« receives channel 3 + 4. Channels 5 – 8 can no more processed with SMUX4, which transmits ADATTM streams with sampling rates from 100.0kHz to 200.0kHz.

in, both optical outputs transmit the same

ADAT

signal and function as signal splitter.

Incoming AES3 or S/P-DIF signals with

50.0kHz to 100.0kHz sampling rates let the optical output format switch to SMUX2.

Sampling rates of 100.0kHz to 200.0kHz of in-

coming AES3 or S/P-DIF signals let the optical

output format switch to SMUX4.

The corresponding SMUX format of the opti-

cal outputs is displayed under »STATUS«.

ADAT

When AES3 or S/P-DIF signals with

sampling rates up to 50.0kHz coming

/ SMUX Ada ption

This setting e.g. allows for unidirectional format conversion (see »MODE«, »UNI-DIR«) of an ADAT

source signal with up to 50.0kHz sampling rate (see »AUDIO IN«, »ADAT«) simultaneously to all available output formats. The sampling rate of the source signal will be displayed in the first LED row, marked with »1«, of the »CLOCK IN« menu. The ADATTM signal will be re-clocked and transfered to both optical ADAT

outputs. Thus, the original input

signal is not lost and available for two times for further use!

Under »REFERENCE« the »ADAT« option is selected automatically. Please see the passage below »Why a Clock Reference for unidirectional ADAT

Conversion without SRC?« for more information on that.

Within the »AUDIO

IN« menu, you can select with the »SELECT« button the

other available digital audio inputs. The reference for the selected audio format will be activated accordingly.

Why a Clock Reference for unidirectional ADAT

To allow for ADAT

format conversion without SRC into AES3 and S/P-DIF,

Conversion without SRC?

the MC-4 needs to derive a valid clock signal from the incoming ADATTM audio source. Therefore, the corresponding reference option is activated in the »REFERENCE« menu automatically. This selection can not be changed.

Converting 2-Channel Signals only

If an AES3 or S/P-DIF 2- channel stereo signal is input for format conversion only (without SRC option), it is imperative to select under »REFERENCE« the corresponding input number »IN1– IN4« as converting reference!

The sampling rate of the incoming AES3 or S/P-DIF signal will be displayed in the »CLOCK

IN« menu.

Converting multichannel AES3 or S/P-DIF Signals

When format converting multiple AES3 or S/P-DIF stereo signals to ADAT

without using the SRC option, you must ensure that the individual stereo input signals are all of equal and sychnronized sampling rates!

Further Setting Examples

32.0

UNI-DIR ADAT

BI-DIR

SMUX2

S/P-DIF

SMUX41 SRC

X-SRC12

MODE

Unidirectional format conversion from ADATTM SMUX4 to AES3, S/P-DIF coaxial, ADATTM SMUX4.

AES3

AUDIO IN

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

44.1

48.0

88.2

96.0

176.4

192.0

32.0

UNI-DIR ADAT

BI-DIR

SMUX2

S/P-DIF

SMUX41 SRC

X-SRC12

MODE

Unidirectional format conversion from S/P-DIF coaxial to AES3, ADATTM. Here, a two channel S/P-DIF signal only is applied at S/P-DIF input »1«, thus under »REFERENCE« the corresponding clock reference »IN 1« is selected. This is the only mode, in which the S/P-DIF interfaces work as inputs!

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

AES3

AUDIO IN

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

44.1

48.0

88.2

96.0

176.4

192.0

OPERATION

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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Unidirectional Format and Sampling Rate Conversions

32.0

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

AUDIO IN

SMUX2

SMUX41 SRC

AES3

S/P-DIF

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

External Clock References

This setting e.g. allows to receive an ADATTM signal with up to 50.0kHz sampling rate. The signal‘s audio format will be converted into AES3, S/P-DIF and ADAT

or SMUX2 /4 simultaneously, as in the previous section

described. Additionally to the format conversion a SRC process is added.

The sampling rate of all outputs now depends on the clock rate of the reference clock signal, which is selected in the »REFERENCE« menu. The above example shows Word Clock (»WCLK«) selected as clock reference, which is the default setting.

In this mode, the following clock references are available for synchronization of the internal SRCs:

WCLK, SCLK AES11 (through separate input at the rear) AES3 IN1– 4, every of the AES3 stereo inputs Internal clock oscillator

To activate a clock source enter the »REFERENCE« menu by pressing the MENU key and press the »SELECT« key repeatedly. When the external clock reference signal can be successfully locked, the blue LED »LOCK »STATUS« menu lights constantly and the clock rate of the clock source is displayed in the »CLOCK IN« menu under »1«.

Individual AES3 Input Signals

Running the MC-4 in the SRC mode, the clock rates of indivudual AES3 input signals can be totally different within a range of 25.0kHz to 200.0kHz. It is also not necessary to feed in signals at all four AES3 inputs. The input assignment is passed to the outputs.

Further Setting Examples

UNI-DIR ADAT

BI-DIR

SMUX2

S/P-DIF

SMUX41 SRC

X-SRC12

MODE

Unidirectional format with sampling rate conversion from AES3 to ADATTM or SMUX2 / 4, S/P-DIF coaxial, AES3. AES11 is selected as clock reference for the internal SRCs.

UNI-DIR ADAT

BI-DIR

AES3

AUDIO IN

SMUX2

S/P-DIF

SMUX41 SRC

X-SRC12

MODE

Unidirectional format with sampling rate conversion from S/P-DIF coaxial to AES3, SMUX2. When the internal clock basis is selected as clock reference with 96.0kHz, the ADAT signal is automatically converted into SMUX2 at the optical outputs. When sampling rates less than 88.2kHz are selected, unidirectional conversion to an 8 channel ADATTM signal is possible from the 4 S/P-DIF inputs.

AES3

AUDIO IN

WCLK

AES11

S/P-DIF

REFERENCE

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

IN 1

IN 2

IN 3

IN 4

IN 1

IN 2

IN 3

IN 4

96.0

44.1

176.4

48.0

192.0

88.2

Internal

Clock

Reference

« in the

32.0

96.0

44.1

176.4

48.0

192.0

88.2

32.0

96.0

44.1

176.4

48.0

192.0

88.2

output

Formats accepted via AES/EBU inputs

The MC- 4’s AES/EBU inputs generally accept AES3, AES11 and S/P-DIF signal formats for conversion to the available output formats.

ADAT

/ SMUX Ada ption

with SRC Option

exceed 50.0kHz, both optical outputs transmit the same ADAT functions as ADAT

If the reference clock exceeds 50.0kHz, the

optical output format will automatically change to »SMUX2« or »SMUX4«, depending

on the reference signal‘s clock rate. The

corresponding SMUX format of the optical

outputs is displayed in the »STATUS« menu.

Does the reference clock signal not

signal and the MC-4

signal splitter.

Locking so-called »Super Clocks«

»Super Clock« (SCLK) reference signals. These clock signals are used preferably for older digidesign ProTools™ MX systems. Specified are only two clock rates, 11.2896MHz +

12.288MHz, which are the x256 multiples of the Word Clock rates 44.1kHz and 48.0kHz.

When locking one of these Super Clocks, the rate will be inverted displayed in the »CLOCK of the corresponding base clock rate, that means Word Clock rate, does not light while

all other LEDs light (see examples below).

Your MC-4 is able to lock so-called

« menu. Thus, the LED in front

1 2

32.0

96.0

44.1

176.4

48.0

192.0

88.2

REF CLOCK IN

Super Clock of

44.1kHz Word Clock

1 2

REF CLOCK IN

Super Clock of

48.0kHz Word Clock

32.0

44.1

48.0

88.2

96.0

176.4

192.0

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

ANHANG

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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Bidirectional Format Conversions

32.0

IN 1

IN 2

IN 3

IN 4

or SMUX2/4 and

44.1

48.0

88.2

96.0

176.4

192.0

Equal Clock Rates for AES3!

Due to the fact, that this is a

imperative that all AES3 signals are of same synchronized sampling rates!

optical outputs transmit the same ADAT

signal and function as signal splitter.

Incoming AES3 signals with 50.0kHz to

100.0kHz sampling rates let the optical output format switch to SMUX2.

Sampling rates of 100.0kHz to 200.0kHz of

incoming AES3 signals let the optical output

format change to SMUX4.

The corresponding SMUX format of the opti-

cal outputs is displayed under »STATUS«.

The S/P-DIF interfaces do not have any function in these bidirectional conversion modes, due to the lack of simultaneous useable inputs and outputs!

format conversion mode only, it is

ADAT

When AES3 signals with sampling

rates up to 50.0kHz coming in, both

/ SMUX Ada ption

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

This setting is a special function of your MC-4! It allows to receive an ADAT signal between 25.0kHz and 200.0kHz simultaneously. The ADATTM input signal is converted to AES3 and the AES3 input signals are converted to ADATTM or SMUX2/4, depending on the common clock rate of the incoming AES3 signals. The format of the optical outputs is changed automatically and displayed in the »STATUS« menu.

In this mode, the MC-4 is able to work simultaneously with two different sampling rates, each within the above mentioned frequency ranges. Therefore, the system uses two PLL synthesizers to lock the incoming ADAT and AES3 signals with their individual clock rates. The status of the PLLs is displayed in the »STATUS« and »CLOCK the two PLL states, the two blue »LOCK« LEDs and the two raws of red »CLOCK IN« LEDs are marked with small numbers »1« and »2«. The number »1« indicates the state of the first PLL, which is standardly connected to the incoming ADAT cond PLL connected to the incoming AES3 signals. To make this more clear, we have also marked the two involved audio formats with small numbers: »ADAT

Necessary Reference Assignment

To allow for bidirectional conversions between ADAT AES3, the MC-4 needs to derive valid clock signals from the incoming audio sources. Therefore, it is a must to activate one of the AES3 inputs »IN1 – 4« in the »REFERENCE« menu, the default setting is »IN1«. The reference »ADAT« or »SMUX2/4« is standardly activated due to the clock rate of the incoming ADAT

Further Setting Examples

AUDIO IN

signal with up to 50.0kHz sampling rate and an 8-channel AES3

« and »AES32«.

S/P-DIF

SMUX2

SMUX41 SRC

AES3

audio signal. Number »2« indicates the state of the se-

or SMUX signal and can not be changed in this mode.

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

IN« menus. To distinguish between

32.0

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

Bidirectional format conversion between SMUX2 with clock rates from 50.0kHz to 100.0kHz and an 8-channel AES3 signal. The sampling rates of the incoming audio signals and the format of the optical SMUX2 outputs are displayed in the »STATUS« and »CLOCK IN« menus.

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

Bidirectional format conversion between SMUX4 with clock rates from 100.0kHz to 200.0kHz and an 8-channel AES3 signal. The sampling rates of the incoming audio signals and the format of the optical SMUX4 outputs are displayed in the »STATUS« and »CLOCK IN« menus.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

AUDIO IN

SMUX2

SMUX41 SRC

AES3

SMUX2

SMUX41 SRC

AES3

S/P-DIF

S/P- DIF

WCLK

AES11

S/P-DIF

REFERENCE

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

IN 1

IN 2

IN 3

IN 4

44.1

48.0

88.2

32.0

44.1

48.0

88.2

96.0

176.4

192.0

96.0

176.4

192.0

ANHANG

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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

Bidirectional Format and Sampling Rate Conversions

32.0

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

AUDIO IN

SMUX2

SMUX41 SRC

AES3

S/P-DIF

WCLK

AES11

S/P-DIF

REFERENCE

This setting allows e.g. to receive an ADAT sampling rate and an 8-channel AES3 signal between 25.0kHz and 200.0kHz simultaneously. The optical ADAT

input signal is converted to AES3 and

ADAT

SMUX2

SMUX4

AES3

signal with up to 50.0kHz

the AES3 signals are converted to ADATTM or SMUX2/4, depending on the clock rate of the reference clock signal. The four AES3 stereo input and the

signals can consist of different sampling rates!

ADAT

The sampling rate of all outputs now depends on the clock rate of the applied reference clock signal, which is selected in the »REFERENCE« menu. The example above shows the Word Clock selected as clock reference (default setting).

In this mode, the following clock references are available for synchronization of the internal SRCs:

WCLK, SCLK AES11 (through separate input at the rear)

, SMUX2, SMUX4

ADAT AES3 IN1– 4, every of the AES3 stereo inputs Internal clock oscillator

To activate a clock source enter the »REFERENCE« menu and press the »SELECT« button repeatedly. When the external clock reference signal can be locked by the internal PLL circuit, the blue LED »LOCK menu will light constantly. The clock rate of the selected clock source is displayed in the »REF CLOCK IN« menu under »1«.

IN 1

44.1

IN 2

48.0

IN 3

88.2

IN 4

« in the STATUS

96.0

176.4

192.0

ADAT

/ SMUX Ada ption

with SRC Option

exceed 50.0kHz, both optical outputs transmit the same ADAT functions as ADAT

If the reference clock exceeds 50.0kHz, the

optical output format will automatically change to »SMUX2« or »SMUX4«, depending

on the reference signal‘s clock rate. The

corresponding SMUX format of the optical

outputs is displayed in the »STATUS« menu.

In this conversion mode, the MC- 4 accepts the incoming AES3 signals with dif ferent sampling rates per stereo input. Due to this, it may be also useful to select one of the stereo inputs as reference clock for the internal SRCs!

Does the reference clock signal not

signal and the MC-4

signal splitter.

Individual AES3 Input Signals

Further Setting Examples

32.0

UNI-DIR ADAT

BI-DIR

SMUX2

S/P-DIF

SMUX41 SRC

X-SRC12

MODE

Bidirectional format and sampling rate conversion between SMUX2 and an 8-channel AES3 signal referenced to a Word Clock signal. The sampling rate of the reference clock signal and the format of the optical SMUX2 outputs are displayed in the »CLOCK IN« and »STATUS« menus.

UNI-DIR ADAT

BI-DIR

AES3

AUDIO IN

SMUX2

S/P-DIF

SMUX41 SRC

X-SRC12

MODE

Bidirectional format and sampling rate conversion between SMUX4 and an 8-channel AES3 signal referenced to the third AES3 input signal. The sampling rate of the reference clock signal and the format of the optical SMUX4 outputs are displayed in the »CLOCK IN« and »STATUS« menus.

AES3

AUDIO IN

WCLK

AES11

S/P-DIF

REFERENCE

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

IN 1

IN 2

IN 3

IN 4

44.1

48.0

88.2

32.0

44.1

48.0

88.2

96.0

176.4

192.0

96.0

176.4

192.0

The S/P-DIF interfaces do not have any function in these bidirectional conversion modes, due to the lack of simultaneous useable inputs and outputs!

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

ANHANG

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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

X-SRC Mode

32.0

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

This setting is a very special and unique function of your MC-4!

The X-SRC mode allows to convert an ADAT signal and an 8-channel AES3 signal into an ADAT the same time, whereas both conversion streams may consist of different sampling rates. On this occasion, the MC-4 extracts the clock out of the two incoming digital audio signals and uses these clock references to synchronize the SRCs in front of each of the format-same outputs. This is especially useful when interconnecting two unsynchronized or unsynchronizable digital audio devices, each running on its own internal clock base.

A standard application is the interconnection of a digital mixing desk and a digital multichannel effects processor. Please see the following sketch to get an overview:

AUDIO IN

SMUX2

SMUX41 SRC

AES3

S/P-DIF

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

signal into an 8-channel AES3

IN 1

IN 2

IN 3

IN 4

or SMUX2/4 signal at

44.1

48.0

88.2

96.0

176.4

192.0

Input:

44.1kHz

Effects Processor

ADAT

44.1kHz

Output:

ADAT

44.1kHz

Clock Extraction

Clock Conversion

44.1kHz ← 48.0kHz

Format of Optical Outputs

The optical outputs follow the clock rate of the ADAT

gnal. Thus, both the optical input and output

are of equal format at any time!

or SMUX input si-

No External Clock Needed

Using the X-SRC mode, the MC-4

of the incoming digital audio signals. Thereby, the system does not need and does not

accept any additional external applied clock reference signals.

extracts the needed clock rates out

MC-4: X-SRC Mode

1. PLL:

44.1kHz

Clock

44.1kHz

2. SRC:

In this example, an ADAT channel AES3 signal with 48.0kHz sampling rate are feed in simultaneously. The ADATTM input signal is converted to AES3 and the AES3 signals are converted to ADATTM. The clock rate of the incoming ADATTM signal is extracted by the first PLL synthesizer and supplied as clock reference to the second SRC, which feeds the optical ADATTM output. The clock rate of the incoming AES3 signal is extracted by the second PLL synthesizer and supplied as clock reference to the first SRC, which feeds the AES3 output.

In this mode, the following clock references are available for synchronization of the internal SRCs:

(predefined with input selection)

ADAT SMUX2 (predefined with input selection) SMUX4 (predefined with input selection) AES3 IN1– 4, every of the AES3 stereo inputs

The optical ADAT the optical ADATTM output. As for the AES3 outputs, one of the four AES3 stereo inputs must be defined as clock source for the first SRC. Therefore enter the »REFERENCE« menu and press the »SELECT« key repeatedly to select one of the AES3 inputs »IN1 – 4«. The example above shows the first AES3 input »IN1« selected as clock reference for the AES3 signal path.

When the external clock reference signals can be locked by the PLLs, the blue LEDs »LOCK clock rate of the clock sources are displayed in the »CLOCK IN« menu under »1« and »2«. The identifier »1« generally indicates the lock status and clock rate of the ADATTM or SMUX clock references. The identifier »2« indicates the lock status and clock rate of the selected AES3 clock reference.

1. SRC:

Clock Conversion

44.1kHz → 48.0kHz

Clock

48.0kHz

2. PLL:

Clock Extraction

48.0kHz

signal with 44.1kHz sampling rate and an 8-

input is predefined as clock source for the second SRC,

« and »LOCK2« in the STATUS menu light constantly. The

Output:

AES3

48.0kHz

Input:

AES3

48.0kHz

Digital Mixing Desk

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

ANHANG

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Further Setting Examples

32.0

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

Bidirectional format and sampling rate conversion between SMUX2 and an 8-channel AES3 signal. The AES3 signals are all referenced to the second AES3 input signal.

UNI-DIR ADAT

BI-DIR

X-SRC12

MODE

Bidirectional format and sampling rate conversion between SMUX4 and an 8-channel AES3 signal. The AES3 signals are all referenced to the fourth AES3 input signal.

AUDIO IN

SMUX2

SMUX41 SRC

AES3

SMUX2

SMUX41 SRC

AES3

S/P-DIF

WCLK

AES11

S/P-DIF

REFERENCE

WCLK

AES11

S/P-DIF

REFERENCE

ADAT

SMUX2

SMUX4

AES3

ADAT

SMUX2

SMUX4

AES3

IN 1

IN 2

IN 3

IN 4

IN 1

IN 2

IN 3

IN 4

44.1

48.0

88.2

32.0

44.1

48.0

88.2

96.0

176.4

192.0

96.0

176.4

192.0

STATUS

This area displays different system conditions of your MC-4. There is no access for changing settings.

« and »LOCK2«

»LOCK

Doing unidirectional format conversions or bidirectional format conversions with SRC, the »LOCK1« LED lights when the internal PLL circuit has detected the incoming digital audio signal or clock reference signal as valid. During bidirectional format conversions or the different X-SRC modes, the »LOCK1« and »LOCK2« LEDs light both, when the incoming digital audio signals are valid. As it is only possible to do bidirectional conversions between ADATTM or SMUX2/4 and AES3, the first LED »LOCK1« is assigned to the optical input and the second LED »LOCK2« is assigned to the AES3 inputs.

If the digital audio or reference clock signal is unstable, the »LOCK or »LOCK2« LEDs do not light, the whole audio conversion process will be stopped and the digital audio outputs do not transmit any signals.

If the internal oscillator is selected as reference clock, the »LOCK light correspondingly.

»SMUX2 + SMUX4 ADAT OUT« These two LEDs light correspondingly, if an SMUX2/4 signal with a sampling rate between 50.0kHz and 100.0kHz (SMUX2), or with a sampling rate between 100.0kHz and 200.0kHz (SMUX4) is output. These LEDs are not reporting any state of the optical inputs!

« and/

« LED will

CLOCK IN

»1« + »2«

This area displays the incoming reference clock rates for the different states of operation of the MC-4.

When working with unidirectional format conversion only, the sampling rate of the digital audio signal, which is selected as reference, will be displayed under »1«. Doing unidirectional format and sampling rate conversion, the clock rate of the selected reference clock signal will be displayed »1« as well.

When working with bidirectional conversion modes, the two LED lines are pre-assigned for ADAT

If the internal oscillator supplies the reference clock for the SRCs, the clock rate which is selected in the »REFERENCE« menu will be displayed under »1«.

or SMUX2/4 with »1« and for AES3 signals with »2«.

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

ANHANG

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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

The following basis reference clock rates are supported and analyzed:

These indications are only available if the internal PLL circuit is locked stably to the external reference signal and the corresponding blue LOCK LED lights permanently.

Word Clock Rates

32.0kHz 44.1kHz 48.0kHz 88.2kHz 96.0kHz

176.4kHz 192.0kHz

Super Clock Rates

11.2896MHz 12.288MHz

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

BEDIENELEMENTE

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

APPENDIX

Pin Assignment of the Connectors

Mains

1 Neutral (blue; USA: white) 2 Protective earth (green/yellow; USA: green) 3 Live, phase (brown; USA: black)

AES/EBU, XLR, Input

1 Audio ground 2 a conductor (hot / +) 3 b conductor (cold / -)

AES/EBU 25pin D-Sub, 8-channel Input and Output

Word Clock + Super Clock BNC In-/Output

1 Signal 2 Ground

S/P-DIF, Cinch, Input / Output

1 Audio signal 2 Audio ground

S/PDIF, Optical, Input / Output TOSLINK Standard

1 Optical signal

1 IN 1/2 (hot) 14 IN 1/2 (cold)

2 IN 3/4 (hot) 15 IN 3/4 (cold)

3 IN 5/6 (hot) 16 IN 5/6 (cold)

4 IN 7/8 (hot) 17 IN 7/8 (cold)

5 OUT 1/2 (hot) 18 OUT 1/2 (cold)

6 OUT 3/4 (hot) 19 OUT 3/4 (cold)

7 OUT 5/6 (hot) 20 OUT 5/6 (cold)

8 OUT 7/8 (hot) 21 OUT 7/8 (cold)

9 NC 22 Frame GND

10 Frame GND 23 Frame GND

11 NC 24 Frame GND

12 Frame GND 25 Frame GND

13 Frame GND

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

SIGNAL PIN SIGNAL

APPENDIX

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Technical Data

ADATTM OPTICAL INPUT (8 CHANNELS)

Interface

Format, Resolution Alesis ADAT

Lock range 25.0kHz to 200.0kHz

AES/EBU AUDIO INPUT (8 CHANNELS)

Interface 1 x Sub-D 25 connector, transformer balanced, input impedance 110 Ω, 200 mV –7 V

Format, Resolution AES3 – 1992/2003, AES11 – 1997/2003, IEC 60958, 16 – 24 bits

Lock range 25.0kHz to 200.0kHz

AES/EBU REFERENCE INPUT

Interface 1 x XLR female, transformer balanced, input impedance 110 Ω , 200 mV – 7.0 V

Format, Resolution AES11 – 1997/2003, AES3 – 1992/2003, 16 – 24 bits

Lock range 25.0kHz to 200.0kHz

ADAT

OPTICAL OUTPUT (8 CHANNELS)

Interface 2 x Toslink

Format, Resolution Alesis ADAT

Transmitted sampling rates 25.0kHz to 200.0kHz

AES/EBU AUDIO OUTPUT (8 CHANNELS)

Interface 1 x Sub-D 25 connector, transformer balanced, input impedance 110 Ω, 200 mV –7 V

Format, Resolution AES3 – 1992/2003, AES11 – 1997/2003, 16 – 24 bits

Transmitted sampling rates 25.0kHz to 200.0kHz

S/P-DIF COAXIAL INPUT OR OUTPUT (8 CHANNELS)

Interface

Format, Resolution IEC 60958, 16 – 24 bits

Supported sampling rates 25.0kHz to 200.0kHz

WORD CLOCK INPUT

Interface 1 x BNC, 200 mV-7 V, unbalanced, input impedance 75 Ω

Lock range 25.0kHz to 200.0 kHz, 11.2896MHz + 12.288MHz (so-called Super Clocks)

WORD CLOCK OUTPUT

Interface 1 x BNC, 3,5 V @ 22 Ω, unbalanced, buffered

Transmitted clock rates 25.0kHz to 200.0kHz

SIGNAL PROCESSING

Digital audio format conversion

Sampling rate conversion

INTERNAL REFERENCE CLOCK SPECIFICATIONS

Oscillator type TCXO, temperature compensated crystal oscillator

Clock accuracy (shipped) < ± 1.0ppm

Clock stability vs. temperature < ± 1.0ppm within -10°C to + 60°C

Operating temperature -10°C to + 60°C

Clock jitter < 10ps (RMS)

POWER SUPPLY

Type Internal, switching power supply

Input voltage 85V – 264V (automatic adjustment), 47Hz – 440Hz

Power consumption max. 10W

SYSTEM UNIT COVER

Cover size / material / color 196 x 42 x 156mm without connectors (W x H x D), aluminium sheet 1mm, black

Front panel size / material 198 x 44 x 2mm (W x H x D), aluminium Weight ~ 850g

2 x Toslink

4 x Coaxial (Cinch/RCA female), unbalanced, 0.5 Vpp @ 75 Ω , output impedance 75 Ω , buffered, switched as inputs or outputs depending on the operation mode

ADAT AES3 → ADATTM + SMUX2 /4, S/P-DIF, AES3 S/P-DIF → ADATTM + SMUX2 /4, AES3 ADATTM + SMUX2 /4 ↔ AES3

Lock range: 4.0kHz to 212.0kHz Dynamic range: 144dB (A-weighted) Resolution: 24Bits THD+N: -140dB Input/Output sampling ratio: 1:16 (upsampling), 16:1 (downsampling)

, EIAJ RC-5720

, SMUX2, SMUX4, 16 – 24 bits

, EIAJ RC-5720

, SMUX2, SMUX4 (4 channels only!), 16 – 24 bits

+ SMUX2 /4 → AES3, S/P-DIF, ADATTM + SMUX2 /4

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