Yamaha Audio MY16-C User Manual

MY16-C

Owner’s Manual

INTERFACE CARD

MY16-C Owner’s Manual

ENGLISH

PRECAUTIONS

PLEASE READ CAREFULLY BEFORE PROCEEDING

* Please keep this manual in a safe place for future reference.

WARNING

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:

• Before installing the MY16-C in an audio device please check to make sure that the device is compatible with the MY16-C, and check possible restrictions regarding the maximum number of Yamaha and third-party expansion cards that can be simultaneously installed. Refer to the operation manual supplied with the audio device, and/or the Yamaha Pro Audio web site at: http://www.yamahaproaudio.com/

• Do not install the MY16-C card in any Yamaha products not specified by Yamaha for use with the MY16-C to avoid possible electrical shock, fire, or equipment damage.

• Do not attempt to disassemble or modify the card. Do not apply excessive force to card connectors or other card components. Mishandling of the card may lead to shock, fire hazard, or equipment failure.

• Be sure to disconnect the power cable of the main unit before installing this card (in order to eliminate shock hazard).

• Turn off all peripheral devices connected to the host device before installation, and unplug all related cables.

CAUTION

Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage to the device or other property. These precautions include, but are not limited to, the following:

• Do not touch the metallic leads (pins) of the circuit board when handling the card. The pins are sharp and may cause hand cuts.

•Wear a pair of heavy gloves during installation to avoid scratching or cutting your hands on sharp edges.

• Avoid touching exposed connectors and metal parts to minimize the possibility of bad connections.

• Drain all static electricity from your clothing and body before handling the card. Static electricity can damage the card. Touch an exposed metal part of the host device or other grounded object beforehand.

• Do not drop the card or subject it to physical shock as this can result in breakage and/or malfunction.

• Do not drop screws or other small parts inside the card. If power is applied while screws or similar metal objects are loose inside the unit the card may malfunction or be damaged. If you cannot retrieve dropped objects yourself, refer the problem to qualified Yamaha service personnel.

Yamaha cannot be held responsible for damage caused by improper use or modifications to the device, or data that is lost or destroyed.

MY16-C Owner’s Manual

ENGLISH

About CobraNet™. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

The MY16-C System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Controls & Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Clock Synchronization Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

MY16-C Card Installation Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Connection Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Thank you for choosing the Yamaha MY16-C CobraNet™ INTERFACE CARD. The MY16-C is a CobraNet™* expansion card for use with compatible Yamaha professional audio equipment. Complying to CobraNet™ standards, the MY16-C allows transmission and reception of up to 32 channels (16 in/16 out) of uncompressed digital audio data.

* CobraNet™: An audio networking system developed by Peak Audio (a division of Cirrus Logic, Inc.) that allows real-time transmission and reception of multiple channels of uncompressed digital audio signals via a Fast Ethernet (100 megabits/sec.) network. A single network cable can handle a maximum of 64 channels (128 channels bidirectional) of audio data.

The Peak Audio home page can be viewed on the web at:

http://www.peakaudio.com/

In order to take full advantage of the advanced features and performance provided by the MY16-C card we urge you to read this manual thoroughly, and keep it in a safe place for further reference.

Before installing the MY16-C in an audio device please check to make sure that the device is compatible with the MY16-C, and check possible restrictions regarding the maximum number of Yamaha and third-party expansion cards that can be simultaneously installed.

The Yamaha Pro Audio web site is at: http://www.yamahaproaudio.com/

• MY16-C card

• This manual

The illustrations in this document are for instructional purposes, and may appear somewhat different from the actual equipment. CobraNet and Peak Audio are trademarks of Cirrus Logic, Inc. Ethernet is a trademark of Xerox Corporation. All other trademarks are the property of their respective holders and are hereby acknowledged.

Table of contents

Greetings

Package Contents

MY16-C Owner’s Manual

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CobraNet is …

An audio networking system developed by Peak Audio (a division of Cirrus Logic, Inc.) that allows real-time transmission and reception of uncompressed digital audio signals via a Fast Ethernet network cable. The network can simultaneously handle up to 64 input and output channels, for a total of 128 channels (64 channels if repeater hubs are used). The maximum number of channels than can be handled in practical situations may be lower due to performance limitations imposed by the equipment used and the condition of the audio signal. Currently, the CobraNet network will handle 16, 20, or 24-bit audio at sampling rates of 48 or 96 kHz. The CobraNet network is capable of transmitting control data at the same time as the audio signals. The types of control data transmitted are determined by the equipment used. The CobraNet network imposes a 5.33-millisecond (2.67 milliseconds or 1.33 milliseconds with some settings) latency on transferred audio signals.

Refer to the Peak Audio home page for more details:

http://www.peakaudio.com/

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Bundles

Audio is transmitted over the CobraNet network in units known as “bundles.” These bundles are processed at the receiving end to reconstitute the original audio signals. In the case of the MY16-C a bundle can contain from 3 to 8 channels. Each bundle is identified by a number from 0 to 65,279, and audio transmission via the network becomes possible when the same bundle number is specified at both the transmitting and receiving devices. Bundles can be transmitted and received over the entire network as long as sufficient network resources are available. The system is designed so that each device can transmit and receive up to 8 bundles simultaneously, but the actual number of bundles that can be handled will depend on the capabilities of the equipment used. The MY16-C can be set to handle 2 transmit bundle numbers and 2 receive bundle numbers. The bundle numbers can be specified via the rotary switches on the MY16-C card itself, or via the device or software used by the device in which the card is installed. The procedure for setting the MY16-C bundle numbers is described in the "Controls & Functions" section on page 8.

About

MY16-C Owner’s Manual

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Multicast Bundles and Unicast Bundles

Two types of bundle can be used with CobraNet: “multicast” bundles and "unicast" bundles. Multicast bundles can be transmitted from a single device to all devices on the network, while unicast bundles are transferred from a single transmitting device to a single receiving device or a limited number of receiving devices. Unicast bundles are only sent to devices which have been set to the same bundle number as the transmitting device. Multicast bundles are sent to all devices on the network regardless of their settings, but only bundles with the specified bundle number(s) are processed. For this reason multicast bundles make heavy use of network resources and it is recommended that the maximum number of bundles be limited to 4 (32 channels). Unicast bundles should be employed when it is necessary to handle 5 or more bundles at a time. Different number ranges are used for multicast and unicast bundles: multicast bundles are numbered 1 through 255, while unicast bundles are numbered 256 through 65,279.

Digital Audio Data

CobraNet Device

CobraNet Device CobraNet Device

Network

Multicast Bundles

Multicast bundles transmitted from device A are sent to all devices on the network (B through D in the example).

Digital Audio Data

CobraNet Device

CobraNet Device CobraNet Device

Network

Unicast Bundles

Unicast bundles are received only by devices set to receive the same bundle numbers as the transmit bundle number of the transmitting device A (device D in this example).

MY16-C Owner’s Manual

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Conductor and Performers

On any CobraNet network one device generates a timing signal that all other devices receive and are synchronized to. The device that generates the synchronization signal is known as the “conductor,” while all other devices are “performers.” The conductor for the network is automatically assigned and need not be specified by the operator. When an MY16-C is assigned to be the conductor for the network, the LED indicator to the right of the connector that is connected to the network will light orange. If the conductor fails for some reason, conductor status is automatically switched to another device on the network. Since the conductor transmits the synchronization signal to the performers via the network cable, no separate word clock cables are required and the total number of cables used by the system is kept to a minimum. Digital audio devices that are not connected to the network, however, will need to receive a word clock signal from a device on the network in order to achieve synchronization.

n Digital signals and control data are transmitted and received by all conductor and performer

devices on the CobraNet network.

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CobraNet Cables and Hubs

Category-5 metal cables can be used for runs of up to 100 meters, while multimode optical fiber cables can be used for runs of up to 2 kilometers. “Cross” and “straight” Ethernet cables are available. “Cross” cables should be used for direct connection between two devices. Hubs and "straight" cables are required to connect 3 or more devices. Ethernet hubs are available in “repeater” and "switching" configurations. Switching hubs are recommended for use on CobraNet networks. The use of repeater hubs can result in excessive network traffic, thus reducing network efficiency. It is best to use a repeater hub that has been tested and certified by Peak Audio.

A list is available at

http://www.peakaudio.com/cobranet/tested_ethernet.html.

Sync (Word Clock)

Performer (Receive)

Conductor (Transmit)

Network

External Digital Device

Conductors transmit the synchronization signal that is received and used by performers. Clock synchronization is necessary to transfer digital audio data to and from devices outside the CobraNet network. In this example device B on the CobraNet network sends the synchronization signal to external device E.

MY16-C Owner’s Manual

ENGLISH

The internal signal flow of the MY16-C is shown in the illustration below. 16 audio inputs and 16 audio outputs are available, and for this example channels 1 ~ 8 are bundle 1, and channels 9 ~ 16 are bundle 2.

n Depending on the setup, less than 8 channels may be handled by each bundle. The relationship between

the settings and the number of channels than can be handled by each bundle is shown below.

Settings vs. Number of Channels per Bundle

*1 Number of channels when 48-kHz channel pairs are combined to create single 96-kHz channels.

Channels per Bundle & Usable No. of Channels

The MY16-C System

Latency

Channels per Bundle

16 bit, 48kHz 20 bit, 48kHz 24 bit, 48kHz 16 bit, 96kHz 20 bit, 96kHz 24 bit, 96kHz

5.33 ms

8874

2.66 ms

888 4*14

1.33 ms

8884*14

Channels per Bundle

Usable No. of Channels

Bundle1 Bundle2

8 1-8 9-16

7 1-7 9-15

4 1,3,5,7 9,11,13,15

3 1,3,5 9,11,13

MY16-C

CobraNet Connector1

CobraNet cable

CobraNet audio signal

Audio signal outside CobraNet network

CobraNet Device

DME64N/24N etc

Optional I/O Slot

CobraNet Audio Audio Convert

Control Data

Receive

Bundle1

Receive Bundle1

Receive

Bundle2

Receive Bundle2

Transmit

Bundle2

Transmit Bundle2

Transmit

Bundle2

Transmit Bundle2

+ 14 hidden pages