Weiss EQ1-MKII User Manual

digital audio

weiss engineering ltd.
Florastrasse 42, 8610 Uster, Switzerland

) [phone] [phone]
8 http://www.weiss.ch / http://www.weiss-highend.com

GAMBIT

EQ1-MK2

OPERATING MANUAL

Software Version: 0S: 4.1

OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 FRONT PANEL

CONTENTS

CONTENTS __________________________________________________________________________2
What's New For The EQ1-MK2 __________________________________________________________3
FRONT PANEL _______________________________________________________________________4

Front Panel Groups ______________________________________________________________________________5

INTRODUCTION _____________________________________________________________________6

Display ________________________________________________________________________________________6
Snapshots______________________________________________________________________________________6
Remote Control _________________________________________________________________________________6

OPERATION__________________________________________________________________________7

Status Display___________________________________________________________________________________7
Band Parameters ________________________________________________________________________________9
Controls______________________________________________________________________________________10
M/S Mode_____________________________________________________________________________________11
Snapshots_____________________________________________________________________________________12
Dither________________________________________________________________________________________14
Display Resolution ______________________________________________________________________________14
LCD Contrast _________________________________________________________________________________14
EQ Bypass ____________________________________________________________________________________14
Remote Control ________________________________________________________________________________14
Software Information____________________________________________________________________________15
Self Test______________________________________________________________________________________15

TECHNICAL DATA___________________________________________________________________16

AES/EBU Input_________________________________________________________________________________16
AES/EBU Output_______________________________________________________________________________16
Power________________________________________________________________________________________19
Overload _____________________________________________________________________________________19
Filters________________________________________________________________________________________19
Parameter Table _______________________________________________________________________________20
Dither________________________________________________________________________________________22
Remote Control Protocol ________________________________________________________________________23

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 FRONT PANEL

What's New For The EQ1-MK2

The double sampling Gambit Series EQ1-DS has now been upgraded to the EQ1-MK2.

Like the old EQ1-DS, the EQ1-MK2 supports 44.1, 48, 88.2 and 96kHz sampling frequencies, always using
either 88.2 or 96kHz for internal processing. This is responsible for the well-renowned sound of the high
resolution units and is the difference to the standard sampling EQ1.

Adding to the high resolution processing, the EQ1-MK2 now features an extended parameter set, signifi­cantly increasing the number of possible eq settings, as well as a new operational mode for processing ste­reo signals in the M/S domain (as compared to processing in the L/R domain – see chapter M/S Mode, p.

11).

The Q now reaches from a near whole-bandwidth-covering 0.20 to a needle-like 650 in 128 steps, allowing
everything from subtle sound colouring to notch filter tone removal. The boost varies in 0.1 dB steps from ­39dB (for notching) to +18dB. To compensate for the extremely accurate notch filter type, the frequency
resolution has been doubled, now running from 14Hz to 21kHz in 12th octave steps plus including special
notch frequencies such as 50 and 60 Hz and their harmonics.

A further new feature is the settable “shape” parameter for shelving filters, which has the same resolution
and a similar effect as the Q parameter for the presence filter type.

Combined with the flexibility of seven independent bands per channel, the mastering engineer can now
twist the transfer curve to his exact specifications.

For exact frequency, boost / cut and Q parameter values please refer to chapter Parameter Table
(p. 20).

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 FRONT PANEL

•

Ž

Œ

FRONT PANEL

•

Graph 1: Front Panel Elements

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 FRONT PANEL

Front Panel Groups

The front panel of the EQ1 offers several control and display features. These can be grouped according to
Graph 1: Front Panel Elements:

Π- Band Parameters

• - Menu
Ž - Controls

• - Snapshots

This manual will explain how to operate the EQ1 according to these groups.

The Bypass key is discussed separately in chapter
EQ Bypass (p. 14). The “gain / data” encoder appears throughout the remainder of this manual and is

therefore not explained separately.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 INTRODUCTION

INTRODUCTION

Congratulations on purchasing the Weiss Gambit Series EQ1-MK2 Digital Equalizer !

This two channel digital equalizer features seven
bands per channel, individually configurable as
low cut, high cut, low shelving, high shelving or
peaking filter. The two channels can be controlled
separately or ganged together at the touch of a
button.

The large CFL LC display and the one-knob-per­parameter operation combine speed and ease of
use with complete control over audio processing.

This and the ability to remote control parameters
and snapshots makes the EQ1 the perfect tool for
the recording and mastering engineer!

Display

Double logarithmic graph of the magnitude

function of the equalizer calculated in real
time

Status display showing sampling frequency,

channel status data handling, current work­space and snapshot number and a resetable
peak-hold and over-hold per channel

Band display (activated by touch) showing

boost, Q/ slope and frequency settings for
each band

Two over-LED’s with settable number of

consecutive over-samples which cause an
“over” display combined with an over-hold
function

Snapshots

3 x 128 non-volatile snapshots where all

parameters are stored

A-B workspaces for quick comparison

between two settings

Remote Control

Supports MIDI, RS-232 and RS-422 proto-

cols

Standard MIDI Continuous Controllers for

parameter remote control (including over­all gain)

Snapshot automatization with MIDI Pro-

gram Change Commands

MIDI Dump of Snapshots

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

OPERATION

The following explanations assume that the equalizer is in power-up mode, i.e. no menu is ac­tive. If a menu is active, press the “menu” key repeatedly until the status display appears.

Status Display

Key A
Key B

Key C

Key C
Key D

Graph 2: Status Display

The status display consists of four groups dis­playing audio signal properties and information
about the current state of the EQ1. The groups
are situated adjacent to the softkeys to the right
of the LCD (Graph 2).

Channel Status Group

Situated adjacent to key A, displays the following
information:

sampling frequency in kHz: “44.1”, “ 48”,

“88.2” or “96”

Use this value to set the optimal gain for a specific
session. Reset it for every session.

Over-Hold
Whenever an over is encountered, the boxes to

the side of the peak-hold values are marked.
The functions of the over-LED’s and the over-

hold both depend on the NUMBER OF

CONSECUTIVE OVER-SAMPLES setting. To adjust

this setting, press key B once. Use the “gain/
data” encoder to change the value, then press
“menu” to return to the status display.

This setting defines the number of consecutive
over-samples needed for an over-indication. To
indicate every over-sample, enter 1. If another
value is entered, you are still able to detect a
single over-sample with the peak-hold function.

pre-emphasis: “E” appears if pre-emphasis

is set (empty if not used)

input output channel status data format:

“C” for consumer and “P” for professional

To change the output channel status data format,
press key A and select format type or loop
through.

Peak Group

Situated adjacent to key B, this group contains a
peak-hold and an over-hold for each channel. To
reset these values press key B twice.

Peak-Hold
The numeric peak value is measured relative to

0dBFS, where 0dB equals digital full scale.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

Over-samples are defined as exceeding the
24bit integer range. A full scale signal
(0dBFS) will not be treated as over. A signal
that triggered an over in a previous pro­cessor in the audio chain will therefore not
trigger an over in the EQ1 (unless boosted).

Remote Group

Situated adjacent to key C, displays remote con­trol protocol (“MIDI”, “RS 232” or “RS 422”),
channel (“1” - “16”) and status (on/ off, displayed
with check box).

For remote control set-up see chapter Remote
Control.

Snapshot Display

Bottom line in the status display. Refer to this for
information on current workspace and snapshot.
There are two workspaces (“A” and “B”) for
quick comparison of two equalizer settings. A
workspace can be stored to a snapshot for later
use.

The number of the last recalled snapshot will be
displayed. If you change any value after the recall,
the “ ” will change to “ ” to symbolize that the
workspace is not equal to the displayed snapshot
anymore.

For snapshot handling see chapter Snapshots (p.

12).

Dither Icon

The dither icon is situated right next to key D
(see Graph 2). If dither is off, the icon contains
the number “24“, the word length of the output
signal in bits. Turning dither on will produce ar­rows above and below the new word length
number (“16“ or “20“). Additionally, if auto­blacking is enabled, the bottom right corner of
the icon is inverted.

For details on dither refer to chapter Dither (p.

14).

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

Band Parameters

What Is A Band?

The EQ1 has seven independent bands per chan­nel. A band has the following parameters which
can be adjusted separately for each band:

1. Mode

2. Boost

3. Q/ Slope / Shape

4. Frequency

Mode specifies the filter type. There are five filter
types (low and high cut, low and high shelving and
peaking) and a bypass mode. Each band has its
own five-LED chain to indicate its active mode
(see Graph 3).

Graph 3: Mode LEDs

To activate a band and see its detailed parameter
values, touch any knob in a band (see Graph 1,

Œ

). The active band’s parameter values will be
shown in the band display (see Graph 4) replacing
the status display, and its LED chain will light up,
showing you where to adjust the parameter val­ues.

Graph 4: Band Display

Depending on the setting of “Auto Switch­back From Band To Status Display”, this
display will hold forever or disappear again
after having released the knob.

High Shelving

Low Shelving

Peaking

High Cut

Low Cut

To change the “Auto Switchback From Band To
Status Display” setting, press the “menu” key,
then select “Controls” with key B. The value can
now be changed with key B.

Range

The parameters’ range is independent of the
mode and is listed at page 20.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

Adjusting Band Parameters

To adjust boost, Q/ slope or frequency simply
turn the corresponding knob (see Table 1).

“boost” “Q/ slope” “frequency”

Peaking-Filter
Shelve-Filter
Cut-Filter

set boost set Q set centre frequency

set boost set shape set 3dB frequency

- set slope set -3dB frequency

To adjust the mode, activate the band. Press a
key (Table 2) to change the mode value. The
active mode is highlighted and the adjacent soft­key is lit.

Key A Key B Key C Key D

Mode

toggle lo- / hi-shelve Peaking toggle lo-/ hi-cut bypass

If the band bypass is on (highlighted), its filter
settings (type and parameters) are saved but have
no effect on the audio signal. Turning bypass off
will restore the previous band settings.

Safe

Pressing the “safe” key will disable all front panel
controls (remote control is still possible) and the
key will be lit. Press it again to restore front panel

Table 1

control.

CH1 & CH2

These two keys patch the band controls to the
according channels. The band controls can either

Table 2

be separate for each channel or ganged together.
The key is lit for the active channel.

To copy CH1 settings to CH2 or vice versa, press
the “copy” key and select an option (Graph 6).

Bypassing all bands is sonically equivalent to
using the overall bypass (refer to

EQ Bypass) if the gain is set to 0.0dB.

Controls

See Graph 1: Front Panel Elements, Ž.

Ganged

When this key is lit, the band controls act for
both channels simultaneously. Switching channels
while the “ganged” key is lit will activate CH1 and
CH2 settings alternately for both channels.

If ganged is off, the controls will affect the active
channel only.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

M/S Mode

A 2-channel stereo signal can be transformed
from the L/R (left/right) domain into the M/S
(mid/side) domain and back without any signal
degradation.

In the M/S domain, the two channels representing
the stereo signal contain information on the Mid
(mono) and Side content of the stereo signal.

Equalizing in the M/S domain can, for example,
just affect vocals or instruments centred in the
stereo mix. Or, by boosting the S channel, result
in frequency dependent stereo-base enhance­ment.

On/Off

Press the “menu” key, then select the “System ->
MS coding” option. This opens the “MS Coding
Setup” menu (see Graphic 5).

If one decides to decode a M/S recording, for
example, the input would have to be set to M/S
and the output to L/R – the eq section can be set
to either, depending upon which domain one
wants to eq.

Another option is encoding a L/R signal to M/S for
further M/S processing outside the EQ1-MK2.
Then the output will have to be set to M/S and
the input to L/R. Again, the eq section can oper­ate in either domain.

To compensate for different non-standardized
M/S formats, there is a L/R swap option. This, as
the name implies, will swap the decoded left and
right channels, and will be used when decoding
M/S recorded material to L/R.

Graphic 5: MS Coding Setup Menu

The MS mode is activated by toggling the “M/S
on/off” value with key C. The M/S icon will ap­pear in the top left corner of the frequency re­sponse window to indicate that M/S mode is ac­tive.

Setup

Several possible M/S configurations can be acco­modated for in the EQ1. This can be achieved
with the “M/S Setup” option by pressing key D.
The user is then taken through a procedure to
specify the setup to be used. The “back” and
“next” keys help negotiating within the setup
procedure.

To eq a standard L/R stereo signal in the M/S
domain, the input and output sections are speci­fied as L/R, while the EQ is set to M/S.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

Snapshots

See Graph 1: Front Panel Elements, •.
Snapshots are copies of the EQ1 parameter set-

tings. This allows recalling complete set-ups in­cluding all filter parameters and controls settings.

Snapshots can be recalled from the front panel or
by remote control (e.g. MIDI Program Change).

A-B Comparison

You can compare two settings by using the two
workspaces “A” and “B”. To toggle between the
two press the “A-B” key. Restore a snapshot or
simply adjust the filters in one workspace, then
switch to the other to compare.

To copy workspace “A” to “B” or vice versa,
press the “copy” key and select an option (Graph

6).

If the “Preview” option is not marked, the
snapshots will be recalled as soon as you
enter a new number.

Press the “recall” key to return to the status dis­play.

“Recall 0”
Snapshot 0 is used as a resetting curve. To reset

the current workspace, press the “recall” key
then the“ Recall 0” key.

Store

To store the current workspace to a snapshot,
press the “store” key. With the “gain/ data” en­coder enter the snapshot number where you
want to store the workspace, then press key D.
Snapshots can be prevented from accidental era­sure by marking the “Safe” option.

Graph 6: "copy" menu

The active workspace is shown in the status dis­play.

Recall

To recall a snapshot press the “recall” key. No­tice that the snapshot will be copied into the ac­tive workspace. If you do not want to lose

these settings, switch to the other workspace by
pressing the “A-B” key.

Using the “gain/ data” encoder enter the number
of the snapshot you want to recall. The graph of
the snapshot will be displayed in preview mode
(outlined) to facilitate finding a certain setting.
However, the audio signal is not affected if the
“Preview” option is marked. Once you have
found the snapshot, press key D to restore it.

A setting can be stored to multiple snapshots.
Press “To Range” in the “store” menu.

Graph 7: Store To Range Menu

Press the adjacent keys to select “Start” and
“End” snapshot number, use the “gain/ data”
encoder to enter a value (Graph 7). Pressing
“Execute” will store the setting from the dis­played workspace (“A” or “B”) to all snapshots
between the Start and End value. A “Safe” snap­shot will not be overwritten.

Backup

All 128 snapshots can be transferred to another
non-volatile memory area for later reference.
There is enough memory for two complete snap­shot sets to be backed up.

Press the “menu” key then choose the “System”
and then the “Backup” option to arrive at the
backup display (Graph 8).

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

Loading

To load a snapshot dump from sequencer, simply
play the dump sequence. The EQ1 will automati­cally switch into receive mode and display statis­tics about the snapshots it’s receiving. If the
transmission was OK and no errors occured, the

Graph 8: Backup Display

program switches back to normal mode. Upon

error, you have to manually switch back to nor­Select “Create 1” to save the current snapshots
to bank 1. Select “Restore 1” to overwrite the
current snapshots with bank 1 (ditto for bank 2).

A backup will overwrite “safe” snapshots.

mal mode.

When playing back the dump sequence, al-

ways use the same speed as when the se-

quence was recorded.

Reset

To reinstall the factory snapshots you must press
the “menu” key then choose the “System” and
then the “Reset all” option. This will reset the
current snapshots. The snapshots that have been
backed up are preserved.

Dumping

The settings of all 128 snapshots can be dumped
to a remote control port to be stored externally.
Please make sure that you have connected eve­rything correctly and that the proper remote
control port is activated (see chapter Remote
Control for setup).

When dumping to a MIDI-sequencer, make sure
that the sequencer is not sending or receiving
data other than the snapshot dump.

Certain sequencers are not capable of hand­ling the amount of data output by the EQ1
and might crash during or after the dump
process.

Always save the sequencer settings before
recording a dump!

To initiate a dump, press the “menu” key then
choose the “System” and then the “Dump” op­tion. Start the recording process on the se­quencer, then press “Transmit”. This releases the
dump to the sequencer.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

Dither

The EQ1 is able to apply shaped dither noise to
remove distortion when re-quantizing from 24bit
to 16bit or 20bit output word length (see
TECHNICAL DATA for dither specifications).

To toggle dither on/off, press key D twice.

Word Length

To set output word length, press key D and
choose either 16bit or 20bit.

Auto-Blacking

If auto-blacking is activated by marking the “0 IN
à 0 OUT“ option, dither will be turned off if the
input signal is digital zero for more than 256 con­secutive samples. As soon as the input signal
changes, dither will be turned on again. This en­sures that breaks between programs are still
digital zero, even if dither is activated.

Display Resolution

The magnitude of the overall frequency response
of the EQ1 is drawn on the LC display. This im­mensely facilitates filter parameter adjustment
because it takes one look to see what the equal­izer is doing instead of having to work it out from
the parameter values.

To obtain the maximum benefit from the graph,
set the vertical display resolution to a range that
just covers your settings. There are four ranges
available:

± 6dB, ± 12dB, ± 18dB, ± 24dB

To change the display resolution, press the
“menu” key, then select “Display”. Choose a
range that suits your curve and press the “menu”
key again to return to the status display.

EQ Bypass

The EQ1 can be completely bypassed with the

green “bypass” key below the mains switch. If the

“bypass” key is lit, the EQ1 is absolutely transpar-

ent, making the output signal bit equal to the

input signal.

While bypass is active (key is lit), the EQ1 works

in preview mode. This allows you to change pa-

rameters without actually affecting the audio sig-

nal. The frequency curve is drawn outlined over

the flat bypass curve, so you still get the advan-

tage of the graph when modifying parameters.

As soon as bypass is deactivated, the outlined

curve takes effect.

Remote Control

All band parameters as well as control settings

can be set externally.

To see remote control status refer to the status

display.

Protocol

To select a remote control protocol, press key C

from the status display menu. Select either “RS

232”, “RS 422” or “MIDI”. This will determine

which port at the rear of the EQ1 is active. The

other inactive ports will be ignored.

Press the “menu” key to return to the status dis-

play if you do not want to change remote on/ off

status.

When selecting a port other than MIDI you have

to specify the baud rate. Refer to the remote

control software manual for correct settings. The

set baud rate is displayed to ensure proper set-

up.

Channel

LCD Contrast

To change the remote control channel number,
To change the display contrast, press the “menu”

key, then select “Display”. Adjust contrast with
the “gain/ data” encoder.

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press key C (adjacent to the remote control

field). Use the “gain/ data” encoder to select a

value between 1 and 16. Press the “menu” key to

return to the status display.

The EQ1 does not support poly-mode (listening

on all channels). Select the same channel on the

OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 OPERATION

controller software as is set internally, else no
remote control messages will be received.

On/ Off

To enable or disable remote control, press key C
(adjacent to the remote control field). Press it
again to toggle the “ON/ OFF”-value.

While remote control is off, data will still be sent
to the selected port. Also, the MIDI THRU out­put will always mirror the MIDI IN input data
regardless of “ON/ OFF” or protocol status.

Software Information

Press the “menu” key, then select the “System ->
About” option. This displays a screen with all the
relevant information on your EQ1 and how to
reach us. Have this page ready when you want to
report a problem.

Self Test

Press the “menu” key, then select the “System ->
Selftest” option. This will start a procedure that
checks the functionality of all input and display
devices.

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

TECHNICAL DATA

AES/EBU Input

Sampling Frequencies: 44.1 kHz, 48.0 kHz, 88.2 kHz, 96.0 kHz
Maximum Input Wordlength: 24 Bits
Channel Status Data: Input accepts professional or consumer format.
Channel Status Bits
forwarded to AES/EBU output: see table below
Connector: XLR female

AES/EBU Output

Sampling Frequencies: 44.1 kHz, 48.0 kHz, 88.2 kHz, 96.0 kHz (always the same as the input)
Output Wordlength: 24 Bits
Connector: XLR male

AES/EBU Channel Status Data

The EQ1 allows to convert the incoming Channel Status Data as follows:

From Consumer to Professional
From Professional to Consumer
Transparent mode, i.e. Channel Status Data is fed forward to the output without any conversion (one

exception, see below)

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The following tables describe how the Channel Status Data bits are generated in the various
conversion modes.

Output selected: Consumer format.

Input: Consumer format.

Output: All bits fed forward (transparent), except for:
Byte 1: Bits 0..6: 0000000 (category code general)

Bit 7: 1 (original)

Input: Professional format.

Output:
Byte 0: Bit 0: 0 (consumer)

Bit 1: 0 (audio)
Bit 2: 1 (copy allowed)
Bits 3,4: Preemphasis according to input
Bit 5: 0 (2 channel mode)
Bits 6,7: 00 (Mode 0)

Byte 1: Bits 0..6: 0000000 (category code general)

Bit 7: 1 (original)

Byte 2: Bits 0,1,2,3: Sampling Frequency according to input

Bits 4,5: 00 (accuaracy grade II)
Bits 6,7: 00

Bytes 3..23: reserved bytes

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Output selected: Professional format.

Input: Professional format.

Output: All bits fed forward (transparent), except for:
Byte 2: Bits 0,1,2: 001 (max. sample length= 24bit)

Bits 3,4,5: 101 (24 bit word length)
Bits 6,7: 00

Input: Consumer format.

Output:
Byte 0: Bit 0: 1 (professional)

Bit 1: 0 (audio)
Bits 2,3,4: Preemphasis according to input
Bit 5: 0 (source fs locked)
Bits 6,7: Sampling Frequency according to input

Byte 1: Bits 0,1,2,3: 0001 (two channel mode)

Bits 4,5,6,7: 0000 (no user bit encoding)

Byte 2: Bits 0,1,2: 001 (max. sample length= 24bit)

Bits 3,4,5: 101 (24 bit word length)
Bits 6,7: 00

Bytes 3..12: All bits 0
Byte 23: CRCC byte

Output selected: Transparent.

Input: Any format.

Output: All bits fed forward (transparent), except if EQ not bypassed:
Byte 2: Bits 0,1,2: 001 (max. sample length= 24bit)

Bits 3,4,5: 101 (24 bit word length)
Bits 6,7: 00

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Power

Mains Voltage: 110 / 220 Volts with voltage selector
Fuse rating: 500 mA slow blow
Power Consumption: 40VA max

Overload

Number of consecutive
over-samples to cause
“over” display: 1..16 settable

Filters

The filter topology used in the EQ1 is a very low noise filter structure for a state of the art performance.

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Parameter Table

Frequencies (in Hertz):

13.8, 15.4, 17.3, 19.4, 21.8, 24.5, 27.5, 30.9, 34.6, 38.9, 43.7, 49.0, 50.0, 51.9, 55.0, 58.3, 60.0, 61.7, 65.4,

69.3, 73.4, 77.8, 82.4, 87.3, 92.5, 98.0, 100, 104, 110, 117, 120, 123, 131, 139, 147, 150, 156, 165, 175,
180, 185, 196, 200, 208, 220, 233, 240, 247, 250, 262, 277, 294, 300, 311, 330, 349, 360, 370, 392, 415,
440, 466, 494, 523, 554, 587, 622, 659, 698, 740, 784, 831, 880, 932, 988, 1047, 1109, 1175, 1245, 1319,
1397, 1480, 1568, 1661, 1760, 1865, 1976, 2093, 2217, 2349, 2489, 2637, 2794, 2960, 3136, 3322, 3520,
3729, 3951, 4186, 4435, 4699, 4978, 5274, 5588, 5920, 6272, 6645, 7040, 7459, 7902, 8372, 8870, 9397,
9956, 10548, 11175, 11840, 12544, 13290, 14080, 14917, 15804, 16744, 17740, 18795, 19912, 21096.

Boost/Cuts, applicable to shelving and peaking filters:

All numbers in dB:

-39.0, -36.0, -33.0, -30.0, -27.0, -24.0, -21.0, -18.0, -17.0, -16.0, -15.0, -14.0, -13.0, -12.0, -11.5, -11.0, -

10.5, -10.0, -9.5, -9.0, -8.5, -8.0, -7.5, -7.0, -6.5, -6.0, -5.5, -5.0, -4.8, -4.5, -4.3, -4.0, -3.8, -3.5, -3.3, -3.0, -

2.9, -2.8, -2.7, -2.6, -2.5, -2.4, -2.3, -2.2, -2.1, -2.0, -1.9, -1.8, -1.7, -1.6, -1.5, -1.4, -1.3, -1.2, -1.1, -1.0, -

0.9, -0.8, -0.7, -0.6, -0.5, -0.4, -0.3, -0.2, -0.1, 0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9. 1.0, 1.1, 1.2, 1.3,

1.4, 1.5, 1.6, 1.7, 1.8, 1.9. 2.0, 2.1, 2.2, 2.3, 2.4, 2.5, 2.6, 2.7, 2.8, 2.9, 3.0, 3.3, 3.5, 3.8, 4.0, 4.3, 4.5, 4.8,

5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0, 10.5, 11.0, 11.5, 12.0, 12.5, 13.0, 13.5, 14.0, 14.5, 15.0,

15.5, 16.0, 17.0, 18.0.

Q, applicable to peaking filters:

0.20, 0.25, 0.30, 0.35, 0.40, 0.45, 0.50, 0.55, 0.60, 0.65, 0.70, 0.75, 0.80, 0.85, 0.90, 0.95, 1.00, 1.05, 1.10,

1.15, 1.20, 1.25, 1.30, 1.35, 1.40, 1.45, 1.50, 1.55, 1.60, 1.65, 1.70, 1.75, 1.80, 1.85, 1.90, 1.95, 2.00, 2.10,

2.20, 2.30, 2.40, 2.50, 2.60, 2.70, 2.80, 2.90, 3.00, 3.10, 3.20, 3.30, 3.40, 3.50, 3.60, 3.70, 3.80, 3.90, 4.00,

4.10, 4.20, 4.30, 4.40, 4.50, 4.60, 4.70, 4.80, 4.90, 5.00, 5.50, 6.00, 6.50, 7.00, 7.50, 8.00, 8.50, 9.00, 9.50,

10.0, 11.0, 12.0, 13.0, 14.0, 15.0, 16.0, 17.0, 18.0, 19.0, 20.0, 22.0, 24.0, 26.0, 28.0, 30.0, 35.0, 40.0, 45.0,

50.0, 55.0, 60.0, 65.0, 70.0, 75.0, 80.0, 85.0, 90.0, 95.0, 100, 110, 120, 130, 140, 150, 160, 170, 180, 190,
200, 220, 240, 260, 280, 300, 350, 400, 450, 500, 550, 600, 650

Shape, applicable to shelving filters:

1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31,
32, 33, 34, 35, 36, 37, 38, 39, 40 ,41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87,
88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111,
112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128

Slope, applicable to cut filters:

0dB/octave, 6dB/ octave, 12dB/ octave

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

Overall Gain:

All numbers in dB:

- , -92.0, -89.0, -86.0, -83.0, -80.0, -77.0, -74.0, -71.0, -68.0, -65.0, -62.0, -59.0, -56.0, -53.0, -50.0, -48.0,

-46.0, -44.0, -42.0, -40.0, -39.0, -38.0, -37.0, -36.0, -35.0, -34.0, -33.0, -32.0, -30.0, -29.5, -29.0, -28.5, -

28.0, -27.5, -27.0, -26.5, -26.0, -25.5, -25.0, -24.5, -24.0, -23.5, -23.0, -22.5, -22.0, -21.5, -21.0, -20.5, -

20.0, -19.5, -19.0, -18.5, -18.0, -17.5, -17.0, -16.5, -16.0, -15.5, -15.0, -14.5, -14.0, -13.5, -13.0, -12.5, -

12.0, -11.5, -11.0, -10.5, -10.0, -9.5, -9.0, -8.5, -8.0, -7.5, -7.0, -6.5, -6.0, -5.8, -5.6, -5.4, -5.2, -5.0, -4.8, -

4.6, -4.4, -4.2, -4.0, -3.8, -3.6, -3.4, -3.2, -3.0, -2.8, -2.6, -2.4, -2.2, -2.0, -1.8, -1.6, -1.4, -1.2, -1.0, -0.8, -

0.6, -0.4, -0.2, 0.0, 0.5, 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

Dither

If no dither is applied to the digital signal when recording to 16bit or 20bit media (e.g. DAT, CD-R etc), the signal will
be truncated, which leads to quantization noise. Graph 9 shows a 24bit sine wave at –85dBFS truncated to 16bit.

Graph 9: Sine wave truncated

Graph 10 shows the same sine wave, but dithered to 16bit. This eliminates quantization distortion.

Graph 10: Sine wave dithered

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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

Restore Snapshot

Program Change

1100 cccc

0ppp pppp

(cccc) Channel No.

(ppppppp) New Prog No:

Adjust Q

Control Change

1011 cccc

00000001 ($01)

(cccc) Channel No.

Adjust Frequency

Control Change

1011 cccc

00000010 ($02)

(cccc) Channel No.

Adjust Slope

Control Change

1011 cccc

00000011 ($03)

(cccc) Channel No.

Adjust Band Mode

Control Change

1011 cccc

00000100 ($04)

(cccc) Channel No.

CH1 Band 2

Control Change

...

$05 - $09

CH1 Band 3

Control Change

...

$0A - $0E

CH1 Band 4

Control Change

...

$0F - $13

CH1 Band 5

Control Change

...

$14 - $18

CH1 Band 6

Control Change

...

$19 - $1D

CH1 Band 7

Control Change

...

$1E - $22

CH2 Band 1

Control Change

...

$23 - $27

CH2 Band 2

Control Change

...

$28 - $2C

CH2 Band 3

Control Change

...

$2D - $31

CH2 Band 4

Control Change

...

$32 - $36

CH2 Band 5

Control Change

...

$37 - $3B

CH2 Band 6

Control Change

...

$3C - $40

CH2 Band 7

Control Change

...

$41 - $45

Overall Gain CH1

Control Change

1011 cccc

01000110 ($46)

(cccc) Channel No.

Remote Control Protocol

MIDI Implementation

Parameter Remote Control
All band parameters plus the controls parameters are remote controllable. Each parameter has its corre-

sponding MIDI controller number.
According to the different parameters, the controllers are limited in their range. Invalid values are replaced

by the maximum allowable values. Following is a list of the supported MIDI system inclusive commands:

Action MIDI Message Status Byte Data Byte(s) Comment

0 - 127

Adjust Boost/Cut Control Change 1011 cccc 00000000 ($00) (cccc) Channel No.
CH1 Band 1 0vvv vvvv (vvvvvvv) New Value:

0 - 127

CH1 Band 1 0vvv vvvv (vvvvvvv) New Value:

0 - 127

CH1 Band 1 0vvv vvvv (vvvvvvv) New Value:

0 - 127

CH1 Band 1 0vvv vvvv (vvvvvvv) New Value:

0 - 2

CH1 Band 1 0vvv vvvv (vvvvvvv) New Value:

0 - 9

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0vvv vvvv (vvvvvvv) New Value:

0 - 127

OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

CH1 / 2 SELECT

Control Change

1011 cccc

01001000 ($48)

(cccc) Channel No.

EQ Bypass

Control Change

1011 cccc

01001001 ($49)

(cccc) Channel No.

Set Ganged Mode

Control Change

1011 cccc

01001010 ($4A)

(cccc) Channel No.

Toggle A <> B

Control Change

1011 cccc

01001011 ($4B)

(cccc) Channel No.

MSC Mode

Control Change

1011 cccc

01001100 ($4C)

(cccc) Channel No.

System Reset

1111 1111

-

Recall Snapshot 0 to WS A

1F0Sysex

Header

200Manufacturer's ID

330Manufacturer's ID

45AManufacturer's ID

506Model ID: 6 = Gambit EQ

6

0000nnnn

Device ID: -> Midi channel number

1-6

...

...

Header

7

00000001

message = Snapshot dump

Message Type

8

0nnnnnnn

Package number ( 0..7F)

Data

9

0nnnnnnn

scale set number

10 - 265

0nnnnnnn

256 Bytes of Snapshot data

266

0ccccccc

Checksum without byte one (F0 Sysex Command)

Checksum

267F7EOS

EOS

Overall Gain CH2 Control Change 1011 cccc 01000111 ($47) (cccc) Channel No.

0vvv vvvv (vvvvvvv) New Value:

0 - 127

0vvv vvvv (vvvvvvv) New Value:

0, 1

0vvv vvvv (vvvvvvv) New Value:

0, 1

0vvv vvvv (vvvvvvv) New Value:

0, 1

0vvv vvvv (vvvvvvv) New Value:

0, 1

0vvv vvvv (vvvvvvv) New Value:

Bit 0: on/off, 1=on
Bit 1: Input: 1=MSC, 0=L/R
Bit 2: EQ: 1=MSC, 0=L/R
Bit 3: Output: 1=MSC, 0=L/R
Bit 4: 1 = CH swap, 0= norm

Dump Remote Control
All System-Exklusive commands consist of a header, a message type, possible data and the EOS (end of

system exclusive). Below is the format of the header:

Byte Value Description Section

Following is a list of the supported MIDI system exclusive commands (without header):
Snapshot format for dump. A complete dump consists of 128 snapshots:

Byte Value Description Section

Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster Page 24 of 26
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OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

1-6

...

...

Header

7

00000010

message = dump request

Message Type

8F7EOS

EOS

1-6

...

...

Header

7

00000011

message = version request

Message Type

8F7EOS

EOS

1-6

...

...

Header

7

00000100

message = send version

Message Type 4

8

0vvvvvvv

OS Version

data

9

0vvvvvvv

DSP Version

10

0vvvvvvv

Scale Version

11

0vvvvvvv

Coeff. Version

12F7EOS

EOS

1-6

...

...

Header

7

00000110

message = send all parameters as single controler messages

Message Type

8F7EOS

EOS

1-6

...

...

Header

7

00000101

message = enter programming mode

Message Type

8F7EOS

EOS

Dump request:

Byte Value Description Section

Version request:

Byte Value Description Section

Version send:

Byte Value Description Section

Workspace and Settings request:

Byte Value Description Section

Programming Mode:

NB: This command triggers the programming mode in the EQ1. In this mode operation from the
front panel is impossible!

Byte Value Description Section

Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster Page 25 of 26
) [phone] [phone] http://www.weiss.c * [e-mail]

OPERATING INSTRUCTIONS FOR GAMBIT EQUALIZER EQ1-MK2 TECHNICAL DATA

RS-232

The implementation is equal to MIDI.
Connector Type: D-SUB female, 9 pin, Pinout:

pin 1: n.c.
pin 2: RS232 output
pin 3: RS232 input
pin 4: connected to pins 6, 8
pin 5: ground
pin 6: connected to pins 4, 8
pin 7: n.c.
pin 8: connected to pins 4, 6
pin 9: n.c.

RS-422

The implementation is equal to MIDI.
Connector Type: D-SUB female, 9 pin, Pinout:

pin 1: remote input +
pin 2: remote output +
pin 3: n.c.
pin 4: ground
pin 5: ground
pin 6: remote input ­pin 7: remote output ­pin 8: ground
pin 9: ground

Daniel Weiss Engineering Ltd., Florastr. 42, CH-8610 Uster Page 26 of 26

) [phone] [phone] http://www.weiss.c * [e-mail]