AMC DSP8X8 User manual

User
Manual
DSP8X8
Digital Signal Processor

Table of contents
USER MANUAL DSP8X8 Digital Signal Processor
Safety instructions
USER MANUAL DSP8X8 Digital Signal Processor
When using this electronic device, basic precautions
should always be taken, including the following:
1 Read all instructions before using the product.
2 Do not use this product near water (e.g., near a bathtub, washbowl, kitchen sink, in a
wet basement or near a swimming pool etc). Care should be taken that objects do not
fall into liquids and liquids would not be spilled on the device.
3 Use this device when you are sure that it has a stable base and it is fixed securely.
4 This product may be capable of producing sound levels that could cause permanent
hearing loss. Do not operate for a long period of time at a high volume level or at a
level that is uncomfortable. If you experience any hearing loss or ringing in the ears,
you should consult with otorhinolaryngologist.
5 The product should be located away from heat sources such as radiators, heat vents,
or other devices that produce heat.
6 Note for power connections: for pluggable equipment, the socket-outlet shall be
installed near the equipment and shall be easily accessible.
7 The power supply should be undamaged and never share an outlet or extension
cord with other devices. Never leave device plugged into the outlet when it is not
being used for a long period of time.
8 Power disconnection: when the power cord connected to the power grid is
connected to the machine, the standby power is turned ON. When the power switch
is turned ON, the main power is turned ON. The only operation to disconnect the
power supply from the grid, unplug the power cord.
9 Protective Grounding - An apparatus with class I construction shall be connected to
a power outlet socket with a protective grounding connection.
Protective Earthing - An apparatus with class I construction shall be connected to a
mains socket outlet with a protective earthing connection.
10 The lightning flash with an arrowhead symbol, with an equilateral triangle,
is intended to alert the user to the presence of uninsulated dangerous
voltage’within the products enclosure that may be of sufficient
magnitude to constitute a risk of electric shock to persons.
11 The exclamation mark within an equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
12 There are some areas with high voltage inside, to reduce the risk of electric shock
do not remove cover of the device or power supply.
The cover should be removed by the qualified personnel only.
13 The product should be serviced by qualified service personnel if:
– The power supply or the plug has been damaged.
– Objects have fallen into or liquid has been spilled on the product.
– The product has been exposed to rain.
– The product has been dropped or the enclosure damaged.
Before you start
Introduction......................................................................................................................................................2
Features................................................................................................................................................................2
Operation
Front and rear panels..................................................................................................................................3
Operating front panel................................................................................................................................5
Software interface
Operation of control software .............................................................................................................6
DSP functions ..................................................................................................................................................7
Software menus..........................................................................................................................................13
FIR filter and applications.....................................................................................................................17
Remote control configuration..........................................................................................................21
Specifications
General specifications.............................................................................................................................33

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
Before you start
02
DSP8X8 is a 8 inputs and 8 outputs DSP matrix audio processor for conference and background
audio systems. It provides with useful voice algorithm AFC, AEC, ANC, and DSP functions including
auto mix, matrix mixer, noise gate, crossover, parametric EQ, delay, compressor, limiter.
03
Operation
Front Panel
Rear Panel
1. LCD screen |2. LED indicators |3. ENTER button |4. ESC(ape) button |5. Rotary dial and select button |6. USB type-B cable socket
1. Mains power connector and power switch |2. Ethernet port |3. GPIO, RS-485 and RS-232 ports |4. Balanced signal outputs 1-8 |5. Balanced signal inputs 1-8
1 2 3 4 5 6
541 2 3
FEATURES
• 8 analog inputs and 8 analog outputs, support to select Line level
and Mic level
• USB audio card inside, 2-in/2-out.
• Support 48V phantom for each Mic level input, 40 level sensitivity
(1dB in step).
• Built-in AFC(feedback control) , 2 level to select.
• Built-in AEC(echo control) for remote video-conference system.
• Built-in ANC(noise control) for optimizing local meeting system.
• Built-in AGC(automatic gain control) for optimizing microphone
signals in complex scenarios
• Input with 8 PEQ and output with 8 PEQ. Support LSLV, HSLV, ALL-
PASS, PHASE, ELLIPTIC, LOW PASS AND HIGH PASS filters. Support HPF
and LPF with Butterworth / Bessel / Linkwitz-Riley.
• Support auto and matrix mixing.
• Support camera tracking with most of camera control.
• 60 presets memory, possibility to lock/unlock preset.
• Control connections: USB or TCP/IP. Configured with RS232 and
RS485 central control connection. Configured with GPIO external control
connection.
• Control software for Windows OS.

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Operation Operation
04 05
Operating front panel
SETTING DEVICE MASTER VOLUME
When device is in default state, turn SELECT knob to adjust device master
volume. It affects all outputs of the device.
ENTER THE MENU
Press ENTER or SELECT to show menu list.
If the screen is locked, hold ENTER or SELECT button for 5 seconds to unlock it.
Turn the SELECT knob clockwise or counterclockwise to select functions:
INPUT VOLUME, OUTPUT VOLUME, PRESETS, INPUT SOURCE, IP SET, RENAME,
SECURITY.
Press ENTER or SELECT button to set function.
Press ESC button to exit menu.
MUNU STRUCTURE
Device menu allows making basic adjustments for inputs and outputs. Use
SELECT knob to select parameter for adjustment, press SELECT or ENTER to
enter adjustment or confirm setting. Pressing ESC button leaves setting without
saving adjusted value.
MENU ITEM REMARK
INPUT VOLUME Mute or adjust input level for each channel
from -60 dB to 15 dB range.
OUTPUT VOLUME Mute or adjust output level for each channel
from -60 dB to 15 dB range.
PRESET Select and load device settings preset.
INPUT SOURCE
Allows selecting input type for each channel:
LINE / MIC / PHAN (for phantom powered microphones)
MIC and PHAN options have gain adjustment option.
IP SET Enter device IP and gateway settings for networked
control.
RENAME Enter the name of the device
SECURITY Enables of disables SCREEN AUTO LOCK function.
Front panel functions
LCD SCREEN
LCD screen is used to display device state and menus. The screen will turn off
automatically, if no user input is made for a period of time.
LED INDICATORS
LED lights for indicating presence of input and output signals, +48 V phantom
power, linking status.
ENTER & ESC BUTTONS
Use ENTER button to make a selection
Use ESC button to exit menu
ROTARY DIAL
Rotating dial clockwise and counter-clockwise navigates the menu and makes
parameter changes.
Pressing the dial makes a selection or confirms parameter setting.
USB TYPE-B PORT
USB port for connecting device to Windows PC.
Rear panel functions
MAINS POWER CONNECTOR AND SWITCH
Connect mains power lead and switch device power ON/OFF
ETHERNET PORT
Connect the device to local Ethernet network.
GPIO, RS485 AND RS232 PORTS
Ports for connecting device control interfaces.
BALANCED SIGNAL OUTPUTS
1-8 audio outputs with balanced Phoenix connectors.
BALANCED SIGNAL INPUTS
1-8 audio inputs with balanced Phoenix connectors.

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Software interface Software interface
06 07
Operation of control software
DSP8X8 provides user with a fast interaction to control one or more devices
through multiple methods: TCP/IP, USB and RS232. Easily set DSP functions and
check central control codes. The configuration parameters can be stored in
presets, convenient for various applications.
SYSTEM REQUIREMENTS
The software works with Windows x64 or x32 operating system, and can run
directly from PC without installation.
CONNECTION SETTINGS
When opening software, user will be given a choice of connection methods:
• TCP – if DSP8x8 is connected to local network.
• USB – if DSP8X8 is connected by using USB cable.
• COM – if DSP8X8 is controlled via serial interface. Please check port and baud
rate before using RS232.
The software will automatically scan for a device using the method set in last
time, to check if device is connected. If successfully connected, devices will be
shown in device list.
DEVICE LIST
User can mute device, refresh connecting, or delete device in this window.
Single click device, to load function interface.
LINKING (GROUPING) MULTIPLE DEVICES
User can link multiple same devices in group by clicking Link button, and then
set group device, group name and main device, link mode and parameter
according to needs.
DSP functions
Double-click HOME icon to open DSP8X8 general view of all functions and
channel settings. Double-click any function icon separately to open the
corresponding interface. When multiple function windows opened, users can
scroll horizontally to see any open function the windows.
TROUBLESHOOTING TCP CONNECTION
When using TCP control, there is a
situation that instead of device name only
one point is displayed, and connection
is not possible. In this case, user needs
to change the IP address of the device
to the same network segment as the PC
computer.
Right-click the device in the list for "change
IP" setting.
Set IP address of device in reference to IP showed in the bottom of the device
list. Set the first three paragraphs to be the same as the IP of PC.
In this example copy 192.168.8
from IP of a computer to
"Net Setting" window.

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INPUT
Input window allows following settings:
• Set Phase;
• Mute;
• Set gain or select Line level;
• Turn microphone phantom power ON/OFF
• Access test signal generator
TEST SIGNAL GENERATOR
Test signal generator allows to generate sine wave, pink or
white noise and route it to selected inputs. It can be used to
test the DSP signal flow or speaker lines.
AEC – ACTIVE ECHO CANCELATION
Acoustic echo cancellation module designed to solve the acoustic feedback
problem. It is mainly used for conference systems. To enabling module user
should set inputs for local microphones, for remote audio (video conferencing
system etc.) and also, for audio output. Need to setup how deep module effects
audio a by selecting AEC level also.
There is option to use an audio from auto mixer module. In this case
“Automixer” button should be selected.
AFC – ACOUSTIC FEEDBACK CONTROL
The processor provides acoustic feedback control function
AFC for microphones. With two levels to select, user
can control acoustic feedback easily when setting each
microphone;
• Level 1, low degree process;
• Level 2, high degree process;
• The window of AFC will show input channel name,
please select corresponding input channel to set.
ANC – ACTIVE NOISE SUPPRESSION
Ambient noise compensation module
designed to eliminate ambient noise and
focus on the vocal or speech to make it
clear as possible. In order to start using this
module audio input and output should be
selected, also need to set level how deep
module eliminates audio which is not
detected as voice.
There is option to use an audio from auto
mixer module. In this case “Automixer”
button should be selected in both
modules AFC and AEC.
NG – NOISE GATE
This DSP professor can
automatically mute input if level
in the input is lower than set
threshold. Noise gate helps to
prevent background noise in
moments when audio input is
activated but not used.
• Attack: 1 to 2895 ms
• Release: 1 to 2895 ms
• Threshold: -90.0 to 0.0 dBu
AGC – AUTOMATIC GAIN CONTROL
Function designed to increase input
gain if audio level is lower than
specified in settings. Auto gain setting
allows set target signal level, ratio,
threshold and timing.
• AttackThrd: -90 to 21dBu
• TargetThrd: -90 to 21dBu
• Attack: 1 to 2895 ms
• Ratio: 1.0 to 100.0
• Release: 1 to 10000 ms
For each input select whether to use Analog input or generated Sine, Pink or
White noise. All test signal generators can be used at the same time.

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AUTO MIX
DSP8X8 has an automated sound mixer that can adjust volume of active sound
sources. This function is mainly used when there are multiple microphones, but
not all are used at the same time, i.e., in a conference.
To use automixer,
function must be
activated via ON/OFF
button (turns green).
Each input must also
be turned ON to be
used in mixing. PR
setting means channel
priority in the mix:
higher priority means
a channel will likely be
amplifier over lower priority channels if they happen to be active at the same
time.
Gain, Slope and Response adjust how fast the mixing process is done.
Output section allows routing automatically mixed signals from all inputs to
one or more outputs.
There is a Automixer button in ANC and AEC windows, which provides user a
signal routing from Auto Mix to ANC or AEC process.
PEQ-X INPUT & OUTPUT EQUALIZER
DSP8X8 has separate equalizers for each input and output. Input EQ contains
15 points, high-pass and low-pass filters, while output EQ contains 10 points,
high-pass and low-pass filters.
Equalizer points can be set in following shapes:
• LSLV - low shelf filter. Adjust part of the frequency spectrum below a set
frequency point.
• HSLV- high shelf filter. Adjust part of the frequency spectrum before a set
frequency point.
• ALLPASS-1, ALLPASS-2 and PHASE filter - Creates a phase shift across the
frequency point. In order to view affected phase in frequency window enable
“Phase” button located on the left corner of the window.
HIGH-PASS & LOW-PASS FILTERS
Under PEQ-X window of each input and output channel users can set individual
high-pass and low-pass filters. DSP8X8 has common filter types with following
slops per octave: 12, 24, 36 and 48 dB.
Enable/disable filter by pressing ON/OFF button and set filter type and
frequency in the HPF or LHP window. Filter frequency can be adjusted by
mouse: to adjust high-pass filter click and hold mouse pointer on the “H”
symbol on frequency curve and drag it left or right to adjust frequency. Hold
and drag “L” symbol to adjust low-pass frequency.
High and low-pass filter types:
• BW – Butterworth
• BL – Bessel
• LW - Linkwitz-Riley
EQUALIZER PRESETS
Equalizer presets allow to save all EQ parameters of the current channel to
the computer. This allows recalling the EQ parameters from computer to any
connected DSP8X8 device. Feature also lets users copy and paste settings from
one channel to other, also clicking "Reset" button will restore EQ of selected
channel to default state (flat, with HFP and LPF set to OFF).
MATRIX MIX
To enable input-output routing, double-click on the corresponding window.
The window is highlighted in blue colour to indicate active routing, and the
amount of signal sent to the output. Double-clicking again deactivates routing.
Single-clicking any window allows changing amount of input signal sent to the
output. Use fader on the right side to adjust the parameter.

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
LINKING CHANNELS
Input and output channels can be linked together to 4 groups.
Each channel can only be assigned to one group at the time,
linking inputs to outputs or USB channels is not possible. Linking
allows synchronized control of channel parameters. Press buttons
1-4 under channel strip to assign channel to group.
Between input and output strips in the mixer is a global input and
output control. Clicking the bottom icon opens channel linking
window. From this window channels can be linked & unlinked from
groups and individual parameters can be selected for each group
for synchronization of the grouped channels.
Software interface Software interface
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DELAY
There are two Delay modules in
DSP8X8: one for inputs, another for
outputs. Settings can be separately
adjusted in each input and output.
Signal delay amount can be set in
feet, meters or milliseconds.
Click red ON button to activate the
delay for the channel, or an arrow
button to reset to default OFF state.
COMPRESSOR
Allow to compress audio signal
dynamic range according to
threshold, ratio and attack/release
settings. Compressor is only available
on output channels.
Click "Compressor OFF" button to
engage the compressor for the
selected channel.
MONITORING AND SETTING OF CHANNELS
On the bottom of the main window DSP8X8 displays all input and output
channels in a channel strip form. User can monitor gain levels, activate EQ,
delay, limiter and compressor functions, also invert phase or mute channels.
LIMITER
Allows limit audio signal amplitude
according threshold settings. It
helps to prevent audio amplifier
overloading and signal clipping.
Limiter is only available on output
channels.
Click "Limiter OFF" button to engage
the limiter for the selected channel.
OUTPUT
Output window allows control of
output level and device master
output level. It also allows phase
inversion and muting of the channel.
Software Menus
MENU - FILE
• New project: the project is restored to the initial state.
• Demo Device: user can view all the functions of the
DSP8X8 without actual connected device.
• Open: open an existing device management project
from the computer.
• Save: save the current equipment management project
in the computer.
• Save as: save the current equipment management
project to the computer in different location or name.
MENU - DEVICE
• Devices: view the software version information, device
name and device IP, gateway and MAC address.
• Channel name: set the name of each input and output
channel.
• Channel copy: copy device input and output channel
parameter, make cross-device copying.
• Central control: a serial interface tool to send and read
DSP8X8 RS232 commands. Please check RS232 command
list in www.amcpro.eu web site. It provides guide and
RS232 control protocol.
• Camera: camera tracking control function.
• GPIO: control device by using GPIO interface.

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
• Priority: Higher number means higher input priority. If the priorities are the
same, the processing is performed in the sequence of triggering priorities. If
two mics speak at the same time, the camera automatically rotates to the preset
position corresponding to the mic with a higher priority or sends the command
corresponding to the mic with a higher priority. However, if the two mics have
the same priority, the signal detected first prevails.
• Active: Enables/disable camera tracking for this channel.
• Apply: Saves the current microphone camera tracking parameter to the
device. After camera tracking is enabled, the parameter must be applied to take
effect.
The preset point, serial port number, camera address, and protocol are related
to the camera and must correspond to the actual camera connection.
Software interface Software interface
14 15
CAMERA SETTING
DSP8X8 can control video cameras via RS232 and RS485 interface. This
feature is perfect for video conference systems. It automatically adjusts video
camera position according preprogrammed presets. All camera positions
are programmable and activated automatically when DSP indicates audio to
programmed microphone inputs.
Before start setting camera presets:
1. Set the serial ports via RS232 or RS485.
2. Set the camera address and protocol type (depends on the camera model).
3. Select preset number and then adjust camera position by using DSP8X8
camera setting window.
4. Click "Save" to save the camera position, "Clear" is to delete the information
of the current preset. "Call" is used to view the camera position saved by the
currently selected preset.
Note: A camera address can contain multiple presets, but one preset
corresponds to only one camera address. Camera Settings and Mic Settings
have preset numbers., serial port numbers, camera addresses, and protocols,
which need to be considered in actual situations.
SET MIC TRACKING
• Mic No.: corresponds
to the input channel of
device. Parameter needs
to be set separately for
each channel.
SET CAMERA TRACKING
• Default: when all mics are
inactive, the camera turns to the
default MIC setting or send the
associated command defined by
the default MIC.
• Threshold: Set the audio input
CENTRAL CONTROL
This menu allows you to find control commands to adjust the parameter
or request DSP status without the control software. There are two types of
commands:
• Read: it’s the command to request DSP parameter status. The user should
select a parameter and the Central control unit generates a control code, which
should be sent to DSP in order to receive feedback with parameter status.
• Set: it’s the command to adjust the DSP parameter. The user should select a
parameter and the Central control unit generates a control code, which should
be sent to DSP in order to adjust parameter status.
GPIO CONTROL
DSP8x8 has an 8 GPIO port to control the main DSP parameters. ALL GPIO
ports can be set as input or output in the GPIO menu also need to set main
parameters: function type, GPIO PIN number, and others, depending on the
selected function.
Before using GPIO as input to control DSP functions user must add pull-up
resistors to keep GPIO input at a high level all the time. The circuit diagram and
GPIO pinout are in page 33.
GPIO output data: Voltage: low level 0V, high level:3V, max. current 10mA.
signal level threshold for camera to react to input. Audio level must be over or
equal to set threshold level, otherwise camera will not reach to audio input.
Then sound level reaches threshold, input is considered active.
• Speech space: This is the maximum time interval that audio level can fall
below threshold for input still to be considered active. Duration of 3 seconds
is considered typical for speech (typical long pause between sentences). If the
signal continues to be below threshold after set time, input is then considered
to be inactive.
• Switch time: The time delay for camera to react to active input. When set to
0,0 camera will react to active input instantly. Setting switch time above 0,0
prevents camera from reacting to momentary microphone activations (i.e. if
microphone with higher priority is bumped by accident).
• Duration: DSP8X8 allows repeated sending of RS232 control codes to prevent
camera control errors due to data loss in transmission. Duration setting is the
time interval between repeated sending of RS232 commands.
0,0 setting means RS232 command will only be sent once without repeating.

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MENU  PRESET
• Save: save all the parameter of
the current settings to the preset.
Total is available 59 presets. The
first (default) preset cannot be
modified.
• Recall: call the device preset to
the current position.
• Delete: delete the existing
preset; the default preset cannot
be deleted, over written or saved.
• Clear: delete all presets in the
device.
• Import preset package: import the preset package file containing multiple
presets on the computer.
• Export preset package: pack multiple presets into one package and export it
to the computer.
• Preset LOCK and Preset UNLOK: Allows setting password in order to prevent
from unauthorized usage.
MENU  SYSTEM
• Language: software is in ENGLISH language only.
• About: control software and device firmware version
information.
• Upgrade: user can upgrade the firmware by using this
function. In general, no need to upgrade the firmware in
device. This is helps if DSP fails or manufacture release
firmware update. Contact distributor or manufacture for
latest information.
• Boot: Please select a certain preset, after setting it as the boot file. Each time
the device is powered on, it will automatically call the Boot preset. The last set
parameters need to be automatically saved. Please set the Auto preset as the
boot file in order to boot DSP with the last settings.
• Import preset: import a single preset file on the computer.
• Export the preset: export all the parameter of the current state to the
computer, and generate a single preset file.
FIR Filter And Applications
When using PEQ to adjust audio signal and set a linear magnitude, the phase of
signal can change due to IIR filter. However, DSP processing provides a useful
tool – the FIR filter to adjust audio signal with a linear phase.
Applications:
• Linear of the phase curve of the speaker;
• Match the phase and magnitude of different speaker models within the same
product line, as well as different speaker models in the installation project to
make it easier to debug speaker groups and arrays;
• Dealing with linear array systems (for audience area coverage optimization);
• Frequency division optimization to improve the consistency of frequency
response of multi-division speakers over their coverage angle range.
Connection schematic diagram
MENU - CONNECTION
• Port: This setting allows choosing connection interface.
There are available three ports: USB, Ethernet (TCP) and
RS232 (COM). Set the connection mode, port number and
baud rate for serial interface.
• Connect: connect and download the device parameter.
• Disconnect: disconnect the connected device.
• Connect all: connect and download the device
parameter of all devices in the device list.
• Disconnect all: disconnect all connected
devices in the device list.
• Port setting: Menu designed to setup RS232
and RS485 bout rate. Please setup bout rate
before using camera control or RS232 interface.

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FIR DESIGNER  IMPORT
• Load: load speaker measurement file from Smaart, usually it’s a .txt file.
• Import Clipboard: load ASCII data directly from Smaart.
• Clear: clear measurement data.
• Normalise magnitude to max or Magnitude offset (dB): this can help user to
adjust a certain dB of magnitude, in order to adjust magnitude curve as little as
possible.
FIR DESIGNER  MAGNITUDE CORRECTION
Magnitude Correction is a useful tool to adjust magnitude of multiple speakers
at once.
Enable correction by clicking ON button and enter minimum and maximum
frequencies for adjustment.
FIR DESIGNER  FIREQ
• There are High pass filter and low pass filter for setting frequency divider,
and 15 bands of PEQ \ LSLV \ HSLV to adjust magnitude. Try to set a linear
magnitude of target speaker.
Note: changing FIR magnitude doesn’t affect its phase.
Devices required:
• Measurement Microphone
• Audio Interface
• Windows PC with installed software including Smaart/REW & AMC control
• DSP8X8
• Power amplifier and speaker
FIR DESIGNER IN MCONSOLE TO SET FIR MAGNITUDE AND PHASE
Beside using third party software, Mconsole provides user a more convenient
way to set FIR magnitude and phase of each channel.
There are two buttons to open FIR DESIGNER interface:
1
2

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FIR DESIGNER  GENERATE
Select Taps (such as 512) of this adjustment, and store it in a FIR channel. Users
can also name this FIR adjustment preset and export it to a .KF file.
TCP/IP CONFIGURATION
DSP8X8 support control over a Ethernet by using TCP client.
TCP/IP setup:
• Transport protocol: TCP client
• IP address: Check IP address information in LCD display, or check it in DSP8X8
AMC control software.
• Network port: 8234
• Time interval between sending control commands should be longer
than 200 ms.
• Presets function require longer time period. Leave more than 3 sec.
pause between control commands.
CONTROL AND FEEDBACK CODE PROTOCOL
DSP8X8 use the same control commands for serial and TCP/IP control. The
control and feedback data structure below.
NOTE: Serial and TCP/IP control cannot be used if device is being controlled
by AMC control software. Only one control method can be used at once: serial
RS232/TCP/IP or AMC control software.
NOTE: All command in user manual are in HEX format.
Remote Control Configuration
RS232 AND RS485 CONFIGURATION
Default DSP8X8 serial interface data:
• Baud rate: 115200 bit/s
• Parity bits: NONE
• Data bits: 8
• Stop bits: 1
• Time interval between sending control commands should be longer
than 200 ms.
• Presets function require longer time period. Leave more than 3 sec.
pause between control commands.
• Baud rate for serial interfaces can be changed in “Connection” and
“Port settings” menu.
Available Baud rates:
• 2400 bit/s
• 4800 bit/s
• 9600 bit/s
• 19200 bit/s
• 38400 bit/s
• 57600 bit/s
• 115200 bit/s
FIR DESIGNER  PHASE CORRECTION
Phase Correction allows linear phase correction of speakers.
Enable correction by clicking ON button and enter minimum and maximum
frequencies for adjustment.

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SEND INSTRUCTION TO DEVICE. CONTROL CODE.
0xA5 0xC3 0x3C 0x5A 0xFF 0x36 0xXX 0xXX 0xXX ... 0xXX 0xEE
Feedback from device:
• 0x00: sending successful
• 0x01: sending failed
READ STATUS OF DEVICE. FEEDBACK REQUEST CODE.
0xA5 0xC3 0x3C 0x5A 0xFF 0x63 0x00 0xXX 0xXX ... 0xXX 0xEE
Feedback from device depends from the requested DSP function. Please read
user manual to find feedback structure in each case.
• 0x00: sending successful
• 0x01: sending failed
NOTE: Reading and switching presets:
In order to switch presets using serial or TCP IP, all presets must be configured
and saved using AMC control software before trying to load it.
It is not possible to load non-configured preset number.
RECALL PRESETS
Start Device ID Control byte Function Data length Value End
A5 C3 3C 5A FF 36 02 01
01 (= default preset)
02 (= preset 2)
…
1D (= preset 29)
1E (= preset 30)
EE
Value byte calculation: Preset decimal number convert to HEX.
Examples:
Command HEX code Feedback HEX code
Recall preset 5 A5 C3 3C 5A FF 36 02 01 05 EE Sending successful 00
Recall preset 25 A5 C3 3C 5A FF 36 02 01 19 EE Sending failed 01
READ CURRENT PRESET NUMBER
Start Device ID Control byte Function Value End
A5 C3 3C 5A FF 63 02 00 EE
Value1 byte: Decides command controls DSP input or output.
Value2 byte: Set input/output channel. Value byte calculation: Channel decimal
number convert to HEX.
Value 3byte: Set audio channel status, mute or unmute.
Examples:
Command HEX code Feedback HEX code
Mute input 1 A5 C3 3C 5A FF 36 03 03 01 01 01 EE Sending successful 00
Unmute input 1 A5 C3 3C 5A FF 36 03 03 01 01 00 EE Sending failed 01
Mute output 1 A5 C3 3C 5A FF 36 03 03 02 01 01 EE Sending successful 00
Unmute output 1 A5 C3 3C 5A FF 36 03 03 02 01 00 EE Sending failed 01
READ MUTE STATUS
Start Device
ID
Control
byte Function Data length Value 1 Value 2 End
A5 C3 3C 5A FF 63 03 02
01 (= input)
02 (=output)
00 (= all channels)
01 (= 1 channel)
…
08 (= 8 channel)
EE
Feedback
Start Device ID Control byte Function Data length Value End
A5 C3 3C 5A FF 63 02 01
01 (= default preset)
02 (= preset 2)
…
1D (= preset 29)
1E (= preset 30)
EE
Value byte reading: Preset number = convert to received HEX byte to Decimal.
Examples:
Command HEX code Feedback HEX code
Read current
preset number A5 C3 3C 5A FF 63 02 00 EE Current preset No1 A5 C3 3C 5A FF 63 02 01 01 EE
Current preset No9 A5 C3 3C 5A FF 63 02 01 09 EE
MUTE CONTROL
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value 3 End
A5 C3 3C 5A FF 36 03 03
01
(= input)
02
(=output)
00 (= all channels)
01 (= 1 channel)
…
08 (= 8 channel)
01
(= mute)
02
(= unmute)
EE

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
Software interface Software interface
24 25
Value1 byte: Sets to reads DSP input or output.
Value2 byte: input/output channel number. To get value convert to decimal
channel number to HEX.
Feedback
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value 3 End
A5 C3 3C 5A FF 63 03 03
01
(= input)
02
(=output)
00 (= all channels)
01 (= 1 channel)
…
08 (= 8 channel)
01
(= mute)
02
(= unmute)
EE
Value1 byte: Describe data is about DSP input or output.
Value2 byte: Channel number. To get value convert to received HEX to decimal
number.
Value3 byte: Channel status, muted or unmuted.
Example
Command HEX code Feedback HEX code
Read input 6
mute status A5 C3 3C 5A FF 63 03 02 01 06 EE Input 6 unmuted A5 C3 3C 5A FF 63 03 03 01 06 00 EE
Read output 1
mute status A5 C3 3C 5A FF 63 03 02 02 01 EE Output 1 muted A5 C3 3C 5A FF 63 03 03 02 01 01 EE
MASTER VOLUME
Note: Master volume level range is from 0dB to -60dB.
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value low byte
Value
high byte End
A5 C3 3C 5A FF 36 04 04 00 01 XX XX EE
Value1 byte: 00 all the time for master volume
Value2 byte: 01 all the time for master volume
INPUT/OUTPUT VOLUME CONTROL
Note: Volume level range is from +15dB to -60dB.
Only analog input/output can be controlled by using serial or IP/TCP
commands. USB input/output volume can’t be controlled.
Start Device
ID
Control
byte Function Data length Value 1 Value 2
Value
low
byte
Value
high
byte
End
A5 C3 3C 5A FF 36 04 04
01
(= input)
02
(= output)
01 (= 1 channel)
…
08 (= 8 channel)
XX XX EE
Value1 byte: selects DSP input or output will be affected.
Value2 byte: Set input/output channel. Value byte calculation: Channel decimal
number convert to HEX.
Value low and high bytes: volume level must be calculated by using formulas.
Check the Low and high byte expression in master volume manual (page No:
25).
Value low and high bytes: volume level must be calculated by using formulas
below:
Low byte expression: =RIGHT(DEC2HEX(A2*10;2);2)
High byte expression: =MID(DEC2HEX(A2*10;4);LEN(DEC2HEX(A2*10;4))-3;2)
In order to calculate values, copy these formulas to excel sheet. The volume
data should be written to the same excel A2 cell.
Example below: Low byte formula copied to C2 cell. High byte formula copied
to D2 cell. Volume level for conversion must be typed to A2 cell.
Example
Command HEX code Feedback HEX code
Set master volume to 0 dB A5 C3 3C 5A FF 36 04 04 00 01 00 00 EE Sending successful
Sending failed
00
01
Set master volume to -10 dB A5 C3 3C 5A FF 36 04 04 00 01 9C FF EE
Set master volume to - 60 dB A5 C3 3C 5A FF 36 04 04 00 01 A8 FD EE

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
Software interface Software interface
26 27
Example
Command HEX code Feedback HEX code
Set input 1 volume to 0 dB A5 C3 3C 5A FF 36 04 04 01 01 00 00 EE Sending
successful
Sending
failed
00
01
Set output 1 volume to -31 dB A5 C3 3C 5A FF 36 04 04 02 01 CA FE EE
Set master Input 6 volume to - 36,4 dB A5 C3 3C 5A FF 36 04 04 01 06 94 FE EE
READING INPUT/OUTPUT VOLUME
Start Device
ID
Control
byte Function Data length Value 1 Value 2 End
A5 C3 3C 5A FF 63 04 02
00 (= master
volume)
01 (= input)
02 (= output)
00 (= master
volume)
01 (= 1 channel)
08 (= 8 channel)
EE
Value1 byte: Sets to reads DSP input or output or master volume
Value2 byte: Input/output channel number. To get value convert to decimal
channel number to HEX. To get master volume feedback this byte should be 00.
Feedback
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value low byte
Value
high byte End
A5 C3 3C 5A FF 63 04 04
00
= master
volume
01
= input
02
= output
00
= master
volume
01
= 1 channel
08
= 8 channel
XX XX EE
Value1 byte: 00 all the time for master volume
Value2 byte: 01 all the time for master volume
Value low and high bytes: volume level must be calculated by using formula
below:
=IF(LEFT(A2;1)=”F”;HEX2DEC(CONCATENATE(“FFFFFF”;A2))/10;HEX2DEC(A2)/10)
In order to calculate volume level, copy this formula to excel sheet C2. The data
from low and high bytes must be written to the same excel sheet A2 cell.
NOTE: First must be written High byte and second Low byte data. No space
between data.
INPUT/OUTPUT VOLUME CONTROL IN STEPS
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value 3 Value 4 End
A5 C3 3C 5A FF 36 05 04
01
= input
02
= output
00
= all
channels
01
= 1
channel
08
= 8
channel
01
= reduce
volume
00
= increase
volume
0A
=1dB
step
14
=2dB
step
1E
=3dB
step
EE
Value1 byte: Sets to reads DSP input or output or master volume
Value1 byte: selects DSP input or output will be affected.
Value2 byte: Set input/output channel. Value byte calculation: Channel decimal
number convert to HEX. Command will affect all inputs/outputs if Value2 byte
will be 00.
Value3 byte: This byte set the step polarity. Depend this byte audio level will be
reduced or increased.
Example below: Formula copied to C2 cell. High and low bytes from feedback
copied to A2 cell.
Example
Command HEX code Feedback HEX code
Read input 6
volume A5 C3 3C 5A FF 63 04 02 01 06 EE
Input 6
volume:
-36,4dB
A5 C3 3C 5A FF 63 04 04 01 06 94 FE EE
Read output 1
volume A5 C3 3C 5A FF 63 04 02 02 01 EE
Output 1
volume:
-5,3dB
A5 C3 3C 5A FF 63 04 04 02 01 CB FF EE
Feedback: A5 C3 3C 5A FF 63 04 04 01 06 94 FE EE
Feedback: A5 C3 3C 5A FF 63 04 04 02 01 CB FF EE

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
Software interface Software interface
28 29
Value 4 byte: It’s about how big step will be. To find byte value step level in
decimal should be multiplier by 10 and decimal number converted to HEX.
Example how to calculate 6dB step: 6*10 = 60. 60 converted to HEX = 3C
Example
Command HEX code Feedback HEX code
Adjust input 1 volume by -3dB A5 C3 3C 5A FF 36 05 04 01 01 01 1E EE Sending
successful
Sending
failed
00
01
Adjust output 1 volume by -1dB A5 C3 3C 5A FF 36 05 04 02 01 01 0A EE
Adjust all inputs volume by -10dB A5 C3 3C 5A FF 36 05 04 01 00 01 64 EE
LINE/MIC SENSITIVITY
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value 3 End
A5 C3 3C 5A FF 36 06 03
01
= 1 channel
…
08
= 8 channel
00
=mic input
01
=line input
00
=gain level 0dB
…
28
=gain level 40dB
EE
Value1 byte: Set input channel. Value byte calculation: Channel decimal number
convert to HEX.
Value2 byte: Switch input setup Mic or Line.
Value3 byte: Sets input gain if Value2 is set to 01 (Mic input). In order to find HEX
value convert decimal gain number to HEX. Gain range from 0dB to 40dB.
Example
Command HEX code Feedback HEX code
Input 1 line input A5 C3 3C 5A FF 36 06 03 01 01 00 EE Sending
successful
Sending
failed
00
01
Input 2 mic input. Gain 10dB A5 C3 3C 5A FF 36 06 03 02 00 0A EE
Input 1 mic input. Gain 30dB A5 C3 3C 5A FF 36 06 03 01 00 1E EE
READING INPUT SENSITIVITY
Start Device ID Control byte Function Data length Value 1 End
A5 C3 3C 5A FF 63 06 01
01
= 1 channel
…
08
= 8 channel
EE
PHANTOM POWER ON/OFF
Note: Phantom power can only be enabled if input is setup to MIC input.
Start Device ID Control byte Function Data
length Value 1 Value 2 End
A5 C3 3C 5A FF 36 07 02
01 = 1 channel
…
08 = 8 channel
00 = OFF
01 = ON
EE
Example
Command HEX code Feedback HEX code
Turn On input 2 phantom power A5 C3 3C 5A FF 36 07 02 02 01 EE Sending successful
Sending failed
00
01
Turn Off input 2 phantom power A5 C3 3C 5A FF 36 07 02 02 00 EE
READ PHANTOM POWER STATUS
Start Device ID Control byte Function Data length Value 1 End
A5 C3 3C 5A FF 63 07 01
01
= 1 channel
…
08
= 8 channel
EE
Value1 byte: Channel number
Value1 byte: Channel number
Feedback
Start Device
ID
Control
byte Function Data length Value 1 Value 2 Value 3 End
A5 C3 3C 5A FF 63 06 03
01
= 1 channel
…
08
= 8 channel
00
=mic input
01
=line input
00
=gain level 0dB
…
28
=gain level -40dB
EE
Value1 byte: Input channel. Value byte calculation: Channel NEX number
convert to decimal number.
Value2 byte: Input sensitivity Mic or Line.
Value3 byte: Input gain level.
Example
Command HEX code Feedback HEX code
Read
input 6 gain A5 C3 3C 5A FF 63 06 01 06 EE Input 6 gain: Line A5 C3 3C 5A FF 63 06 03 06 01 00 EE
Read
output 1 gain A5 C3 3C 5A FF 63 06 01 01 EE Input 1 gain: Mic 27 dB A5 C3 3C 5A FF 63 06 03 01 00 1B EE

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
Software interface Software interface
30 31
Feedback
Start Device ID Control byte Function Data length Value 1 Value 2 End
A5 C3 3C 5A FF 63 07 02
01 = 1 channel
…
08 = 8 channel
00 =Phantom Off
01 =Phantom On
EE
Value1 byte: Input channel number.
Value2 byte: Phantom power status.
Example
Command HEX code Feedback HEX code
Read input
3 phantom
power status
A5 C3 3C 5A FF 63 07 01 03 EE Input 3
phantom On A5 C3 3C 5A FF 63 07 02 03 01 EE
Read input
1 phantom
power status
A5 C3 3C 5A FF 63 07 01 01 EE Input 1
phantom Off A5 C3 3C 5A FF 63 07 02 01 00 EE
AFC FEEDBACK CONTROL
Start Device ID Control byte Function Data
length Value 1 Value 2 End
A5 C3 3C 5A FF 36 08 02
01 = 1 channel
…
08 = 8 channel
00 = AFC is Off
01 = AFC level 1
02 = AFC level 2
EE
Value1 byte: Input channel number.
Value2 byte: AFC On/Off control and level.
Example
Command HEX code Feedback HEX code
Turn On input 1 AFC on level 2 A5 C3 3C 5A FF 36 08 02 01 02 EE Sending successful
Sending failed
00
01
Turn Off input 1 AFC A5 C3 3C 5A FF 36 08 02 01 00 EE
READ AFC STATUS
Start Device ID Control byte Function Data length Value 1 End
A5 C3 3C 5A FF 63 08 01
01 = 1 channel
…
08 = 8 channel
EE
Value1 byte: Channel number.
MATRIX CONTROL
Start Device ID Control
byte Function Data length Value 1 Value 2 Value 3 End
A5 C3 3C 5A FF 36 09 03
01
= 1 input
…
08
= 8 input
01
= 1 output
…
08
= 8 output
01
= connect
00
= disconnect
EE
Value 1 byte: input channel.
Value 2 byte: output channel.
Value 3 byte: input and output status, connected or not.
Example
Command HEX code Feedback HEX code
Input 1 connected to output 3 A5 C3 3C 5A FF 36 09 03 01 03 01 EE Sending successful
Sending failed
00
01
Input 1 disconnected from output 1 A5 C3 3C 5A FF 36 09 03 01 01 00 EE
Input 2 connected to output 1 A5 C3 3C 5A FF 36 09 03 02 01 01 EE
Feedback
Start Device ID Control byte Function Data length Value 1 Value 2 End
A5 C3 3C 5A FF 63 08 02
01 = 1 channel
…
08 = 8 channel
00 = AFC is Off
01 = AFC level 1
02 = AFC level 2
EE
Value1 byte: Channel number.
Value 2 byte: AFC level.
Example
Command HEX code Feedback HEX code
Read input 5
AFC status A5 C3 3C 5A FF 63 08 01 05 EE Input 5 AFC level 1 A5 C3 3C 5A FF 63 08 02 05 01 EE
Read input 8
AFC status A5 C3 3C 5A FF 63 08 01 08 EE Input 5 AFC level 2 A5 C3 3C 5A FF 63 08 02 08 02 EE

USER MANUAL DSP8X8 Digital Signal ProcessorUSER MANUAL DSP8X8 Digital Signal Processor
Technical Specifications DSP8X8
Power supply ~ 115-230 V, 50/60 Hz
Power consumption 14 W
Input / output connector Balanced Phoenix
Input impedance 16 kΩ
Maximum input level Line: 17 dBu
Mic: -3 dBu
Output impedance 150 Ω
Maximum output level +10 dBu
Maximum gain -40 dBu
Frequency response 20 Hz - 20 kHz
THD+N Line: -90 dB (@ 17 dBu, 1 kHz)
Mic: -90 dB (@ -6 dBu, 1 kHz, 20 dB gain sensitivity)
SNR Line: 110 dB (@ 17 dBu, 1 kHz)
Mic: 100 dB (@ -6 dBu, 1 kHz, 20 dB gain sensitivity)
Phantom power +48 V DC, 5.5 mA in each input channel
Sampling rate 48 kHz
AD/DA converter 24 bit
Process 32 bit float point DSP 400 MHz
System delay <3 ms
Control protocols RS232, RS485, TCP/IP,GPIO
Control ports USB Type B, RJ45, USB, phoenix
Indicator light Input signal, Phantom power, Link, Output signal
Supported OS Windows
Dimensions (H x W x D) 483 x 265 x 44.5 mm
Weight 3.3 kg
Software interface
32 33
READ MATRIX STATUS
Start Device ID Control byte Function Data length Value 1 Value 2 End
A5 C3 3C 5A FF 63 09 02
01 = 1 input
…
08 = 8 input
01 = 1 output
…
08 = 8 output
EE
Value 1: Input channel number
Value 2: Output channel number
Feedback
Start Device ID Control
byte Function Data length Value 1 Value 2 Value 3 End
A5 C3 3C 5A FF 63 09 03
01
= 1 input
…
08
= 8 input
01
= 1 output
…
08
= 8 output
01
= connect
00
= disconnect
EE
Value 1 byte: Input channel number
Value 2 byte: Output channel number
Value 3 byte: input and output status, connected or not.
Example
Command HEX code Feedback HEX code
Read input 1
and output 1
status
A5 C3 3C 5A FF 63 09 02 01 01 EE Input 1 and output
1 connected A5 C3 3C 5A FF 63 09 03 01 01 01
Read input 3
and output 8
status
A5 C3 3C 5A FF 63 09 02 03 08 EE Input 3 and output
8 disconnected A5 C3 3C 5A FF 63 09 03 03 08 00
DECIMAL AND HEXADECIMAL DIGIT TABLE
DEC: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
HEX: 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
DEC: 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
HEX: 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E
General Specifications
DSP8X8 Digital Signal Processor
The specifications are correct at the time of printing this manual.
For improvement purposes, all specifications for this unit, including
design and appearance, are subject to change without prior notice.
GPIO Connector
1. +5V
2. GPIO in/out 1
3. GPIO in/out 2
4. GPIO in/out 3
5. GPIO in/out 4
6. GPIO in/out 5
7. GPIO in/out 6
8. GPIO in/out 7
9. GPIO in/out 8
10. GND
11. RS485 +
12. RS485 –

USER MANUAL DSP8X8 Digital Signal Processor
Notes
34