intrend ITDSP-0404D User manual

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OPERATING MANUAL
ITDSP-0404D
ITDSP-0808D
ITDSP-1208D
ITDSP-1616D
ITDSP-0404Dv2
ITDSP-0808Dv2
ITDSP-1616Dv2
Digital Sound Processor

Operating Manual for Digital Sound Processor (DSP) V3.0
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Help File
1. Technology Overview ....................................................5
1.1 Introduction to Technology ............................................................................................................................ 5
1.2 Audio Input Section........................................................................................................................................... 5
1.3 Audio Output Section....................................................................................................................................... 6
1.4 Float Point DSP................................................................................................................................................... 7
1.5 Audio Flow........................................................................................................................................................... 9
1.6 Typical System Application ........................................................................................................................... 10
2. Hardware ................................................................. 12
2.1 Safety Instructions ........................................................................................................................................... 12
2.2 Audio Wiring Reference................................................................................................................................. 13
2.3 Specifications .................................................................................................................................................... 15
2.4 Mechanical Data............................................................................................................................................... 16
2.5 Front Panel......................................................................................................................................................... 16
2.6 Rear Panel .......................................................................................................................................................... 17
3. Software................................................................... 18
3.1 Software Installation ....................................................................................................................................... 18
3.2 Using the Software .......................................................................................................................................... 19
3.3 Custom edit processing module.................................................................................................................. 20
3.4 Audio Module Parameters............................................................................................................................. 20
3.4.1 Input Source............................................................................................................................................... 21
3.4.2 Expander ..................................................................................................................................................... 22

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3.4.3 Compressor & Limiter............................................................................................................................. 23
3.4.4 Auto Gain Control .................................................................................................................................... 25
3.4.5 Equalizers.................................................................................................................................................... 26
3.4.6 Figure Balancer.......................................................................................................................................... 28
3.4.7 Feedback Inhibition ................................................................................................................................. 28
3.4.8 Noise Gate.................................................................................................................................................. 31
3.4.9 Ducker.......................................................................................................................................................... 32
3.4.10 Spl............................................................................................................................................................... 33
3.4.11AutoMixer.................................................................................................................................................. 33
3.4.12Echo Canceller.......................................................................................................................................... 37
3.4.13Noise Suppression .................................................................................................................................. 37
3.4.14 Matrix ........................................................................................................................................................ 38
3.4.15 High & Low Pass Filter.......................................................................................................................... 38
3.4.16 Delayer ...................................................................................................................................................... 39
3.4.17 Output....................................................................................................................................................... 39
3.4.19 USB Soundcard ....................................................................................................................................... 41
3.5 Setting Menu..................................................................................................................................................... 43
3.5.1 File Menu .................................................................................................................................................... 43
3.5.2 Device Setting............................................................................................................................................ 44
3.5.3 GPIO Setting .............................................................................................................................................. 44
3.5.4 Group Setting ............................................................................................................................................ 47
3.5.5 Panel Setting
.............................................................................................................................................. 48
3.5.6 Dante Setting............................................................................................................................................. 51
3.5.7Help Menu................................................................................................................................................... 55

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4. Dante Audio .............................................................. 56
4.1 Dante Overview ................................................................................................................................................ 56
4.2 Dante Requirements .................................................. 58
4.3 Dante Network Design................................................................................................................................... 58
4.4 Dante Modes..................................................................................................................................................... 60
4.5 Dante Controller............................................................................................................................................... 61
4.6 Dante Virtual Soundcard................................................................................................................................ 61
5. Control .................................................................... 63
5.1 External Control Programmer....................................................................................................................... 63
5.2 Control Protocol............................................................................................................................................... 63
5.3 Serial Port-to-UDP (RS232 To UDP)............................................................................................................ 67
5.4 ASCII control command ................................................................................................................................. 68
6. FAQs ....................................................................... 73
Appendix A: Module ID Distribution..................................... 74
Appendix B: Module Parameter Types (1) ............................. 75

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1. Technology Overview
1.1 Introduction to Technology
DSP Series are equipped with several core technical features to facilitate the work of audio
engineers. DSP-based remote audio hardware is routed, processed and controlled via computer.
This Manual mainly introduces the techniques used to achieve the goal.
DSP Controller is a Windows-based application, which is used to conduct configuration and
control on DSP hardware. DSP Controller has 16 built-in presets, and the modules and sequences
for each preset can be flexibly designed in accordance with the designer's requirements. After
the design is finished, it can be saved for future use. The sequences and parameters of DSP
Controller's built-in processing modules accord to most of the application scenarios without any
change.
DSP Controller is a full-featured application including the parameter adjustment and
peripheral accessory settings of all modules, such as RS232, RS485, click-and-drag panel
configuration and Dante network audio control etc. The most interesting part is the user interface,
which allows the engineer to customize user interface so that the integrator can edit it or the
onsite technicians or end users who have no idea of relevant techniques can operate it. Superior
safety functions make it possible for the end users to access to the controls allowed by the
engineer or designer.
1.2 Audio Input Section
DSP supports up to 16 fixed analog audio inputs, which can be connected via removable
balanced phoenix connectors. The analog input section supports microphone or line-level signals
whose nominal levels are 0dBu, 10dBu, 20dBu, 30dBu, 40dBu and 43dBu. +48VDC phantom
power can be adopted for each input.
Preamp gain and phantom power can be conveniently controlled via DSP Controller.

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A/D Technical Indicators:
Sampling rate: 48kHz
THD+N:≤0.001%@4dBu（A-weighting）
Dynamic range: 110dB
Audio format: 24Bit MSB TDM
1.3 Audio Output Section
Phase 1 of analog output section refers to D/A converter (DAC). DSP adopts advanced 24-
bit 256X sampling converter. Just like A/D converter, it also uses multi-bit architecture for
broader dynamic range; in the meantime, it is also equipped with excellent distortion just like
regular digital unit analog converter. Unit gain (0dB) is set via volume control, and the analog
output section is corrected as +4dBu with 20dB headroom. That is to say, 0dBFS digital signal is
equivalent to +24dBu output signal. If other signal levels are required, you may change the
volume to achieve it.
D/A Technical Indicators:
Sampling rate: 48kHz
THD+N:≤0.001%@4dBu（A-weighting）
Dynamic range (A-weighted): 112dB
Audio format: 24Bit MSB TDM

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1.4 Float Point DSP
DSP device adopts analog device SHARC DSP, enabling 32-bit and 40-bit floating-point
processing, which can be compared to 40-bit floating-point processing of other devices.
Floating-point processing provides prominent advantages for the users in terms of sound quality
and usability.
Fixed-Point Processing Limitations
Fixed-point processing has its own disadvantages. If there is a significant change in gain,
data loss or more severe situation may occur, including clipping distortion. For example, for the
processing of 24-bit fixed point-based audio signal, in some cases, if you attenuate the signal to
42dB, the new signal only includes 17-bit information. Due to gain attenuation, 7-bit information
will get lost forever. More worse is the clipping distortion. For a signal nearly close to 0dBFS, the
signal will be clipped at 0dBFS and the audio distortion will occur. Even if the signal level is
adjusted to below 0dBFS through post-regulation, the clipping has occurred, and the distortion
still exists. Fixed point processing can help to create some headroom above 0dBFS. By doing so,
some bits have to be abandoned. For example, if a 12dB (2 bits) headroom is created, a 24-bit
system actually only has 22 bits.
Floating-Point Processing
In the contrary, by taking advantage of floating-point processing, no matter what the signal
level is, all available bits are uniformly distributed to the signals. Basically, the floating points use
some bits as indexes to set up general signal level and distribute the remaining bits to signals
with independently stored level. As a result, no matter what kind of level (from -200dB and 200dB
below to 0dBFS above, the stored signal's accuracy is optimized without clipping distortion.
SHARC provides 32-bit and 40-bit accurate processing; through 32-bit processing, 25 bits are
distributed to storage signals no matter what its signal level is. This means that, based on at least
1-bit low level signal, its accuracy is always significantly superior to 24-bit fixed point processing.
Through expanded 40-bit accurate processing, 33-bit storage signal can be achieved.
Practical Significance
What's the practical significance of floating point processing for the users? The gain stages
between multiple modules can be ignored. If the signal level of a module is reduced by 50dB
and is then restored to its original value through another processing, data loss will not occur. In
the fixed-point system, the users must check other signal levels before sending it to A/D
converter because all digital-to-analog converters adopt fixed points. In DSP system, if you

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notice that your signal has been clipped before it is outputted and transmitted to the digital-to-
analog converter, you may close it off immediately at the output section to correct the situation.
By using the fixed point system, you have to search each processing module to find the clipping
source.

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1.5 Audio Flow

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1.6 Typical System Application
Conference Amplifying System: The processor can be connected to capacitor microphone, local
output amplifier and speaker so as to decorate and process with the signals via the speaker on
output channel. The output signal can also transmitted to the recording device with Dante interface
via such interface, such as computers with Dante virtual soundcard. By adopting a simple control
panel, volume adjustment, scenario call and other functions can be achieved via UDP control
processor.
Dante Application: Dante network breaks through space limitations, and has a wide range of
application scenarios. It can connect all devices that support Dante protocol to the same local area
network. By cascading 2 DSPs, it supports the access of up to 32 analog microphones and 32 Dante
microphones. Each processor will conduct first-level auto mixing on its own microphones, and the
second-level auto mixing is then made on the mixed signal via the auto mixer of main processor so
that more microphones can be connected to build a larger auto mixing matrix. The two-level auto
mixing working mode can satisfy general application scenarios.

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2. Hardware
2.1 Safety Instructions
Safety Instructions
Important safety instructions:
1.Read these instructions.
2. Keep these instructions well.
3.Pay attention to all warnings.
4.Follow all instructions.
5.Please keep the device away from water. The device shall not be exposed to water drips or water
splashes; make sure that there is no object with liquid near the device, such as vase.
6.Please use dry cloth to clean up the device.
7. Please do not block the vent. Please get the device installed based on the manufacturer's
instructions.
8.Please do not install any heat source, such as radiator, heat register, furnace or other devices
(including amplifiers) that generate heat.
9.Please adopt protective grounding connection to connect the device to the power socket. Please
do not use polarized plug or grounding plug. A polarized plug has two leaves, and one is wider than
another. A grounding plug has two leaves and a third ground terminal. The wide leaf or third ground
terminal can provide safety for the users. If the plug provided does not accord to the power socket,
please contact the electrician to replace the old socket with a new one.
10. Protect the power cord so that it will not be tramped or protruded, especially the plug, the socket
and the connections of cord and device.
11. Please use the accessories designated by the manufacturer.
12. Please only use the cart, the tripod, the holder or the desk designated by the manufacturer or
sold together with the device. When using the cart, please take care with the mobile cart/device to
avoid injury from rollover.
13. Please unplug the device during a thunderstorm or during the idle period.

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14. Please find qualified maintenance personnel to deal with all maintenance problems. When the
device gets damaged in any manner, the maintenance is required. For example, the power cord gets
damaged, the liquid will spill over or the object falls into the device; the device is exposed to the
rainwater or moisture; the operations are not correct, or the device falls off.
The lightning logo (an equilateral triangle with an arrow) is used to make the users aware of the
uninsulated "dangerous voltage" within the product shell, which may cause electric shock. An
equilateral triangle with an exclamation mark is adopted to make the users understand the
importance of the operations and maintenance instructions given in the appendixes attached to the
product.
Warning: In order to prevent electric shock, please do not use a polarized plug provided by a device
with an extension cord. The socket outlet cannot be inserted except for sharp end.
2.2 Audio Wiring Reference
Balanced Connection
Any of these interfaces may occur on both sides of the connection.
Note: For one XLR interface, the female connects to the output device and the male connects to the
input device.

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Unbalanced Connection
RCA interface and 1/4-inch TS interface are unbalanced interfaces. A multi-stand shielding conductor
may be installed on both ends of unbalanced connection.

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2.3 Specifications
Take 16x16 as an example (including Dante).
Processor ADI SHARC 21489(x2)
Sampling rate/Digitalizing bit 48K/24bit
Input Gain 0/3/6/9/12/15/18/21/24/27/30/33/36/39/42/45/
48 dBu
Phantom Power 48V
Frequency Response (20~20KHz) ±0.2dB
Maximum Level +18dBu
THD + Noise 0.001%@4dBu
Dynamic Range 110 dB
Background Noise (A-weighted) -91 Db
Common Mode Rejection Ratio @60Hz 80dB
Channel Isolation @1KHz 108 dB
Input Impedance (Balanced Connection) 9.4KΩ
Input Impedance (Balanced Connection) 102Ω
System Delay <3ms
Working Power AC110~240V 5Hz-60Hz
Maximum Power Consumption <40W
Dimensions (Width x Depth x Height) 482 x 260 x 45mm
Shipping Weight 3KG

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2.4 Mechanical Data
Space required:
1U (width * depth * height: 18.91″x 9.5″x 1.72″/ 48.02 cm x 24.13 cm x 4.37 cm). The reserved head
space is not included in the depth.
An additional space at least 3 inches shall be reserved for the connection of rear panel. The
reserved depth depends on the wire used and the connection mode.
Electrical Property:
Maximum universal input power: 110-240 VAC, 50/60 Hz, 40 W.
Ventilation:
The recommended highest operating ambient temperature is 30℃/ 86℉.
Make sure that there is no blockage on both sides (a gap (at least 5.08cm, 2 inches) shall be
reserved). Please do not cover the thermovent of the device with newspapers, table cloth, curtain
and other objects.
Shipping Weight:
6.6 lbs. (3 kg)
2.5 Front Panel
Power: LED power indicator;
STATUS: The operation status indicator of the device;
USB AUDIO: USB soundcard (1-in-1-out), which can be used to achieve recording function.

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2.6 Rear Panel
①POWER power interface: connect to 110V- 240V AC power supply, and the rocker switch
controls the power supply of the processor.
②ETHERNET network control interface: By connecting this network port, the client computer
can debug and monitor the equipment.
③Dante network interface: used to connect Dante audio network.
④RS232+RS485 interface: connect to the control terminal or central control equipment.
⑤GPIO interface: Eight definable input/output logic level control ports, driven by the control
module in the device design. It can be set in the software to meet the output level (0V or 5V)
after internal conditions trigger; Or input level triggering (0V or 5V) to control corresponding
internal functions.
⑥OUTPUT analog signal output interface: can be connected to power amplifiers, active
speakers and other equipment.
⑦INPUT analog signal input interface: can connect microphone, DVD and other devices.

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3. Software
3.1 Software Installation
A Windows PC with a 1 GHz or higher processor and:
Windows 7 or later.
1 GB of free storage space.
1024 x 768 resolution.
24-bit or higher color.
2 GB or more of memory.
Network (Ethernet) interface.
CAT5 cable or existing Ethernet network
The audio processor has built-in control software, which can be downloaded quickly by accessing
the IP address of the audio processor. Enter the IP address of the device in the browser address bar
to access the audio processor, find the download link and download the installation software to the
local to complete the installation. The factory default IP address of the device is: 169.254.10.227
Subnet mask: 255.255.0.0, please add the address of this network segment in the PC first, so that
the device can access normally. After the device is started, enter "http:/ /169.254.10.227/".

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Before installing the PC software, please make sure that a newer version of Microsoft .Net Framework has
been installed on the PC.
Note: If the download and installation of the software fails, please use IE or Google Chrome to try, or enter
the browser settings and cancel the browser download pop-up prompt to try again.
3.2 Using the Software
After enabling the software, the main menu is shown as below:
Click the button in the right corner of the main menu, and find all processors on the
network automatically. The user may connect to the designated processor based on their own needs;
after the connection, the indicator will flash, and one processor supports simultaneous connection
and control of up to four users.
：restore default scene
：factory reset

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3.3 Custom edit processing module
Click on the edit button, input or output channel processor module right-click selection, edit dialog
box, can replace the current processing module, can delete, copy and other operations, edit good
click upload to the host. Note: when the CPU display more than 100 will turn red, this time the
resource can not be uploaded to the host, need to be re-edited.
3.4 Audio Module Parameters
There are two regulation modes for module parameters: firstly, directly click the input or output
channel modules, and enter the parameter interface of the module; secondly, right click the module
and the configuration interface will pop out. The first regulation mode is adopted for the following
module parameters.