DATEQ DDA-43DT Network Dsp Power Amplifier User Manual

: September 26, 2024
: DATEQ

Table of Contents

Chapter 1 Introduction
Chapter 2 Technical parameters
Chapter 3 Functions structure
Chapter 4 Operation of control software – MusicAllDSP
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DATEQ DDA-43DT Network Dsp Power Amplifier User Manual

Chapter 1 Introduction

DDA-43DT is a 4 channel network DSP power amplifier, integrated with DSP processor, IPS color display and other powerful functions. This power amplifier supports a variety of input methods: analogDante network. User can select each analog or Dante signal with its priority, which realize signal backup function. Support constant resistance 8/4 and constant voltage 100V/70V. Standard FIR automatic linear magnitude and phase function provides the user a powerful method to setup speaker settings.

The installer can set a maximum output power / voltage / current for every channel. This amplifier can be used with any speaker in any project. This amp can be customized to all conditions.

User can monitor power, current, voltage, temperature and impedance from display in real time. With RJ45/USB and common serial connector, PC software MusicAllDSP provides the user a easy way to control multiple devices, identify devices, remotely turn on/off and set DSP function. RS232/RS485/GPIO connectors add support to control the device by a third-party system.

Applications

Sports stadium
Colleges and universities
Meeting Room
Shopping mall
Hotel
Airport terminal

Features

Dante network audio in option and Dante-Analog backup function
Built-in DSP processor
FIR automatic linear magnitude and phase
Remote on / standby, call amplifier
Supports 100V / 70V / 8Ω / 4Ω
Free setting to limit power and voltage
IPS color display
Monitoring temperature / power / voltage / current / resistance

Chapter 2 Technical parameters

Chapter 3 Functions structure

Chapter 4 Operation of control software – MusicAllDSP

MusicAllDSP provides the user a fast interaction to control one or more devices through multiple methods: TCP/IP, USB, common serial port (RS232/485). Easily set DSP functions of device, GPIO control and check central control codes. The configuration can be stored in presets, convenient for various applications.

4.1 Operating condition

MusicAllDSP is suitable for Win7/8/10/11 x86/x64 PC systems with Microsoft .NET Framework 4.0 installed. Double click the file with the MusicAllDSP logo:

4.2 Connect to PC

4.3 DSP functions setting

4.3.1 DSP functions setting – INPUT (Support Dante/Analog backup)

Set source of each channel;
Set sensitivity of each channel 0/6dBu;
Set gains, phase or mute in each channel;
When choosing test signal, users can select Sine/Pink Noise/White Noise for each input channel.

Dante and analog signal backup

1. Connect both analog and Dante signal input interface, and select AnalogPri as source, analog signal would be in priority for using. In events of disconnecting analog source, the amplifier would switch Dante signal automatically.

2. Connect both analog and Dante signal input interface, and select DantePri as source, Dante signal would be in priority for using. In events of disconnecting Dante source, the amplifier would switch analog signal automatically.

Remark: Backup mode only supports analog signals and Dante signals with the same audio (pause during playback is the same).

4.3.2 DSP functions setting – NOISE GATE

4.3.3 DSP functions setting – PEQ-X (input and output)

4.3.4 DSP functions setting – DELAY (input and output)

4.3.5 DSP functions setting – MATRIX MIX

In the above figure, input channel (on top side) corresponds to output channel. The value box with a value is mixing key of channels. When the mixing key is green (double-click the value box to switch the state), the input channel and output channel signal realizes the mixing function.

The right part of the above figure contains the gain, reset button, and clear button of the matrix mix. Click the value box on the left, and then drag the sliding block of the matrix mix gain or enter a value in the value box to adjust the matrix block Click the reset button to reset the matrix mixing function to the initial one-to-one state; click the clear button to clear all the matrix mixing functions, and there is no correspondence between the input and output of the device.

4.3.6 DSP functions setting – COMPRESSOR

4.3.7 DSP functions setting – LIMITER

4.3.8 DSP functions setting – OUTPUT

4.4 Monitoring and setting of channels

User can monitor gains level of input and output channels.

4.4.1 Channel gain level

There are 3 kinds of input signal in some products: ANALOG, DANTE network audio, testing signal and AutoMix (analog and Dante). It will show a label for user.
Input value, drag gain fader or use mouse pulley to set value of gain.

4.4.2 Quick buttons of DSP in channels

4.4.3 Group and channels link

User can quickly set channels in groups for opening or closing mute, phase, noise gate, PEQ and delay function.

New project : the project is restored to the initial open state.
Demo Device : user can view all the functions of the device without affecting the specific device connected.
Open : open an existing device management project from the computer disk.
Save : save the current equipment management project in the computer disk.
Save as : save the current equipment management project to the computer disk.

Devices : view or modify the software version information, device name and device IP address of the upper and lower computer of the device. Set password of device.

Channel name : set the name of each input and output channel, with memory function.

Channel copy : copy device input and output channel parameter, can realize cross-device copy parameter (Note: the same type of device is required).

Central control and GPIO : provides user a quickly way to inquiry code of Center Control and GPIO setting. More details, please refer to another user manual , it provides whole guide and codes for user to match every specific system.

Port : set the connection mode, port number and baud rate, confirm the connection mode and then select the corresponding port.

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.

Save : select the saved gear, save all the parameter of the current automatic gear of the machine to the device preset (2~30 Preset bit).

Recall : call the device preset to the current automatic gear position.

Delete : delete the existing preset, the default file cannot be deleted, over written or saved.

Clear : delete all presets in the device.

Boot : select a certain preset, after setting it as the boot file, each time the device is powered on, it will automatically call the save the parameter; the last set parameter need to be automatically saved, please set the automatic file to the boot file.

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.

Import preset package : import the preset package file containing multiple presets on the computer.

Export preset package : pack multiple presets in the machine’s preset into one preset package and export it to the computer.

Language : multi-language switching, supports simplified, traditional, and ENGLISH.

About : current control software and device firmware version information.

Upgrade : use can upgrade the firmware by using this function, a upgrade .bin file should be needed from seller or speaker factory. In general, no need to upgrade the firmware in device. Only there is a bug or new function in software, upgrade function will be used.

4.10 FIR filter and function

4.10.1 FIR filter and applications

When user uses PEQ to adjust audio signal and set a linear magnitude, he can find the phase of signal changed, due to IIR filter. However, DSP products provide user a useful tool FIR filter to adjust audio signal with a linear phase.

Some calculation:
Frequency resolution = Sampling/Taps
Available min. frequency Frequency resolution*3

Means when use adjust audio signal with 48kHz, 1024 taps, FIR filters will take effect in frequency above 141Hz of audio signal. The taps value more high, the FIR filter curve more steep.

FIR filter processing audio signal will produce a certain delay:

Delay = (1/Sampling Hz)*Taps/2

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.

Devices required :

Connection schematic diagram:

4.10.2 Using FIR DESIGNER in MusicAllDSP to adjust FIR magnitude and

phase

Beside using third party software, MusicAllDSP provides the user a more convenient way to adjust FIR magnitude and phase of each channels.

There are two ways to open FIR DESIGNER interface:

Click “FIR” – “Designer” button to enter FIR automatic linear magnitude and phase function interface.
Or click “FIR DESIGNER” in main interface to enter FIR automatic linear magnitude and phase function interface, which can quickly help user return to the page he set last time. Let’s begin to set:

4.10.2.a 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.

4.10.2.b 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. Mark: changing FIR magnitude doesn’t effect its phase.

4.10.2.c FIR DESIGNER – Magnitude Correction and Phase Correction

Of course, if there are too many speakers to be adjust, user has to spend a long time manually adjusting their magnitude. In this case, Magnitude Correction will be more useful. Just enable ON button for frequency.

After adjusting magnitude, set linear phase of speaker.

4.10.2.d FIR DESIGNER – Generate

Select Taps (such as 512) of this adjustment, and store it in a FIR channel. User can also name this FIR adjustment and export it to a .KF file. After finish all setting, return back to FIR interface. Cancel BYPASS button to make it work.