MUSIC ALL DSP-48DT FIR DSP Speaker Processor
Product Specifications
- Model: DSP-48DT
- Type: Network DSP FIR Processor
- Channels: 4×8 input/output, 4×4 Dante channels
Product Usage Instructions
1. Technical Parameters
The DSP-48DT features a high-performance DSP processor with the following specifications:
- Processor: ADI SHARC 21489 450MHz
- System Delay: 2.1ms
- AD/DA: 24-bit 96KHz
2. Audio Inputs and Outputs
The device supports various input signals and offers balanced inputs and outputs:
- Analog Audio Inputs: 4 channels balanced with an input impedance of 20K and max input level of 20dBu/Line
- Dante In/Out: 4×4 channels
- Output: 8 channels balanced at line level with an output impedance of 50
3. Audio Performance Specifications
The audio performance specifications include:
- Frequency Response: 20Hz-20kHz(+-0.5dB)/Line
- THD+N: -93dB(@0dBu,1kHz,A-wt)/Line
- Ground Noise: 20Hz-20kHz, A-wt, -93dBu
- SNR: 113dB(@16dBu,1kHz,A-wt)/Line
4. Connection Ports and Indicators
The device features various connection ports and indicators:
- USB: Type A-B
- RS232: Serial port communication
- TCP/IP Interface: RJ-45
- Indicator Light: Clip, level, edit, mute
5. Electrical and Physical Specifications
- Supply: AC100V-240V 50/60 Hz
- Product Dimensions: 483mmx215mmx44.5mm
- Packaged Dimensions: 537mmx343mmx77mm
- Net Weight: 3.8kg
- Packaged Weight: 4.2kg
- Operating Temperature: -20 to 80°C
Frequently Asked Questions
- Q: How do I control multiple devices using the DSP-48DT?
- A: You can control multiple devices using the PC software MusicAllDSP provided with the device. Simply connect via RJ45, USB, or RS232 connectors to access control functions.
- Q: How do I optimize speaker parameters with the FIR DSP audio processor?
- A: The standard FIR designer in the MusicAllDSP software offers automatic linear magnitude and phase functions, making it easy to optimize speaker parameters for your specific setup.
- Q: What are the operating temperature limits of the DSP-48DT?
- A: The device is designed to operate within a temperature range of -20 to 80°C.
DSP-48DT
Network DSP FIR Processor 4×8 4×4 Dante channels
FIR DSP SPEAKER PROCESSOR
Chapter 1
Introduction
DSP-48DT is a 4in 8out FIR DSP audio processor, integrated with high performance DSP processor, Dynamic EQ, FIR automatic linear phase and other powerful functions. This audio processor supports a variety of input signals: AnalogAES3Dante network audio. Standard FIR designer in the MusicAllDSP software provides automatic linear magnitude and phase function, easy to optimize speaker parameters.
With RJ45USB and RS232 connectors, PC software MusicAllDSP provides users an easy way to control multiple devices. The RS232 connection supports control by a third-party system.
Applications Party room Live show Outdoor activities Sports stadium
Features 4 analog inputs and 8 analog outputs. Each input can be switched to AES3 signal. 4 channels Dante network audio. High performance DSP processor, 96k 24bit sampling rate. Input with 15 bands PEQ, output with 10 bands PEQ. Supports HPF and LPF with ButterworthBesselLinkwitz-Riley. Support LSLV and HSLV, ALL-PASS, Band pass, Band stop filters, Phase, Notch filters. Input with 3 bands Dynamic EQ. Input with 4 x 512Taps 48k FIR linear phase setting. Output with 4 x 512Taps 48k FIR linear phase setting. Standard FIR automatic linear phase function designer. Support presets archiving and locking, hide setting parameters. Control connections: USB or TCP/IP. Configured with RS232 central control connection. Nice GUI windows 7/8/10/11 software. LED VU indicator for input and output signals. High analytical power, wide dynamic audio performance, suitable for stage, bar and other high-end sound systems.
– 1 –
FIR DSP SPEAKER PROCESSOR
Chapter 2
Technical parameters
DSP-48DT
1. DSP Processor
Process:
ADI SHARC 21489 450MHz
System delay:
2.1ms
AD/DA:
24-bit 96KHz
2. Analog Audio Inputs and Outputs
Input:
4 channels balanced.
Input interface:
XLR(Neutrik®)
Input impedance:
20K
Max input level:
20dBu/Line
Dante in/out
4×4 channels
Output:
8 channels balanced. Line level
Output interface:
XLR(Neutrik®)
Output impedance:
50
3. Audio Performance Specifications
Frequency response: 20Hz-20kHz(+-0.5dB)/Line
THD+N:
-93dB(@0dBu,1kHz,A-wt)/Line
Ground noise:
20Hz-20kHz, A-wt, -93dBu
SNR:
113dB(@16dBu,1kHz,A-wt)/Line
4. Connection Ports and Indicators
USB:
Type A-B
RS232:
Serial port communication
TCP/IP interface:
RJ-45
Indicator light:
Clip, level, edit, mute
5. Electrical and Physical
Supply:
AC100V240V 50/60 Hz
Product Dimensions
483mmx215mmx44.5mm
Packaged Dimensions 537mmx343mmx77mm
Net Weight
3.8kg
Packaged Weight
4.2kg
Operating temperature: -2080
– 2 –
FIR DSP SPEAKER PROCESSOR
Chapter 3
Functions structure and panel operation
Dimensions (mm)
FIR DSP SPEAKER PROCESSOR
Operating front panel
Press MENU, it will show menu list, using NEXT or BACK to select functions: GLOBAL MEMORY, INPUT SECTION, MATRIX, SYSTEM, press QUIT to exit.
Functions in panel Menu list
1.GLOBAL MEMORY 2.INPUT SECTION 3.MATRIX
RECALL a Memory STORY a Memory DELETE a Memory A ANALOG (DANTE) B ANALOG (DANTE) C ANALOG (DANTE) D ANALOG (DANTE) Routing Out.1=Input A*….
4.SYSTEM
1 IP SET 2 RENAME 3 DSP VERSION
Remark
Long press such output channel button under LED to change.
Press BYPASS, it will quickly show RECALL a Memory function, using NEXT or BACK to select presets and then press ENTER to enable one of presets.
– 4 –
FIR DSP SPEAKER PROCESSOR
Operation of buttons on front panel – Input & Output Channels When user need to quickly mute input or output channel, shortly press button under the LED of such channel, the light will turn red.
When user need to set parameter of input or output channel, long press button under the LED of such channel, the light will turn blue.
Functions – Input channels
IPX Input X Gain IPX Input X Polar IPX Input X PEQ:1…15 IPX Input X HPF IPX Input X LPF IPX Input X Delay IPX Input X Noise Gate IPX Input X Noise Gate IPX Input X DEQ:1…3 IPX Input X DEQ:1…3 IPX Input X DEQ:1…3 IPX Input X DEQ:1…3 IPX Input X Fir
Buttons for setting
+,FREQ, Q, GAIN FREQ, Q FREQ, Q GAIN FREQ Q, GAIN FREQ, GAIN Q, GAIN Q, GAIN Q, GAIN
Functions – Output channels
OPX Output X Gain OPX Output X Polar OPX Output X PEQ:1…15 OPX Output X HPF OPX Output X LPF OPX Output X Delay OPX Output X Compress
Buttons for setting
+,FREQ, Q, GAIN FREQ, Q FREQ, Q GAIN FREQ, Q, GAIN
– 5 –
Buttons for setting
BYPASS BYPASS BYPASS
BYPASS BYPASS BYPASS BYPASS BYPASS BYPASS BYPASS
Buttons for setting
BYPASS BYPASS BYPASS
BYPASS
FIR DSP SPEAKER PROCESSOR
OPX Output X Compress OPX Output X Limiter OPX Output X Limiter OPX Output X Fir
Q, GAIN Q, GAIN GAIN
BYPASS BYPASS BYPASS BYPASS
Remark: X” means the No. of such channel user has selected. If find no effect after setting parameter, please check whether select BYPASS or not.
When user need to link channels and then set their parameter, long press button under the LED of each channel, the light will turn blue. LCD will display “IPX+” or “OPX+”, means the second channel or other channels will be set same with first channel.
When user need to quickly mute channels in link setting, shortly press button under the LED of one of channels, all the lights will turn pink.
– 6 –
FIR DSP SPEAKER PROCESSOR
Chapter 4 Operation of control software – MusicAllDSP
MusicAll provides user with a fast interaction to control one or more devices through multiple methods: TCP/IP, USB, common serial port (RS232). Easily set DSP functions of device 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:
the main interface will pop up:
– 7 –
4.2 Connect to PC
FIR DSP SPEAKER PROCESSOR
If you connect the device by using network cable, click Setting in Device List, choose TCP in Connection window.
If you connect the device by using USB A-B, click Setting in Device List, choose USB in Connection window.
If you connect the device by using serial cable, click Setting in Device List, choose COM in Connection window. Please check port and baud rate carefully for 232 or 485 before setting.
The software will use the method set last time to check if the device is connected. If successfully connected, devices will be shown in device list.
Users can mute devices, refresh connections, or delete devices in this window. Single click the device to load the function interface.
– 8 –
FIR DSP SPEAKER PROCESSOR
When using TCP control, there is a situation that only one point is displayed after scanning, but you can not connect the device. In this case change the IP address of the device to the same network range as the computer.
Right-click the device enclosure, a Net Setting window will show.
Set the IP address of the device. Refer to the IP showed in the bottom of the software. (the first 3 digits xxx.xxx.xxx. should be the same as the computer.
Successfully scanned and connected.
– 9 –
FIR DSP SPEAKER PROCESSOR
User can link a multiple of the same devices in groups by clicking the Link button, and then set group device, group name and main device, link mode and parameters according to needs.
4.3 DSP functions setting Double-click HOME icon to open all functional interfaces, or double-click a function icon separately to open the corresponding interface. When multiple function windows are opened, users can drag the window to switch function Settings.
– 10
FIR DSP SPEAKER PROCESSOR
4.3.1 DSP functions setting – INPUT
Set Phase of input; Set Mute of input; Select AnalogAES3Dante input signal; When choosing test signal, user can
select Sine/Pink Noise/White Noise for each input channel.
4.3.2 DSP functions setting – NOISE GATE
Attack: 1 to 2895ms; Release: 1 to 2895ms; Threshold: -90 to 0dBu;
Click this function.
to enable
– 11
FIR DSP SPEAKER PROCESSOR
4.3.3 DSP functions setting – PEQ-X (input and output)
High pass filter
enter value of frequency and select type, press
to enable this function:
Butterworth 6/12/18/24/36/48, Bessel 12/24/36/48, Linkwitz-Riley 12/24/36/48.
Low pass filter
enter value of frequency and select type, press
to enable this function:
Butterworth 6/12/18/24/36/48, Bessel 12/24/36/48, Linkwitz-Riley 12/24/36/48.
PEQ 15 bands for input channel Type: PEQ/LSLV/HSLV/ALLPASS-1/ALLPASS-2/3 kinds of high/low pass,Phase, Band pass,Band stop,Notch filter; Freq(Hz) Q Gain(dB): input value or use mouse pulley to set value; Users can also drag the frequency dot on the curve to adjust.
PEQ 10 bands for output channel Type: PEQ/LSLV/HSLV/ALLPASS-1/ALLPASS-2/3 kinds of high/low pass,Phase, Band pass,Band stop,Notch filter; Freq(Hz) Q Gain(dB): input value or use mouse pulley to set value; Users can also drag the frequency dot on the curve to adjust.
– 12
FIR DSP SPEAKER PROCESSOR
Phase curve: display the phase curve of the current channel. View: show or hide all balance control points. Bypass: turn on or off all equalizer EQ of the current channel at the same time Preset: save all the setting parameter of the equalizer of the current channel to the computer, and recall the channel equalizer parameter of the computer, which can be called across channels and devices. Copy: copy the current channel equalizer parameter value, which can be pasted to other similar channels (such as input channel parameter can only be copied to other input channels). Paste: used in combination with the copy button to paste the last copied equalizer parameter value to the current channel. Reset: reset the equalizer parameter to the default parameter values.
As shown in the figure above, the left side
is the interface switching
button for each channel. Click to switch the EQ channel, and the color is the currently
selected channel.
is the curve color of the EQ channel.
For each channel’s EQ
curve display switch, check it to enable it to display the curves of other channels in the
current channel interface.
– 13
4.3.4 DSP functions setting – DYNAMIC EQ
FIR DSP SPEAKER PROCESSOR
Mode: Boost AboveBoost BelowCut AboveCut Below Threshold: -90 to 24.0dBu Q: 0.27 to 15 Ratio: 1.0 to 100.0 Max Gain: 0.0 to 12.0 Attack: 1 to 2895ms Frequency: 20 to 22000Hz Release: 1 to 2895ms Type: BYPASSPEQ Bypass button to switch
4.3.5 DSP functions setting – DELAY (input and output)
Max 2000ms for input channel; Max 2000ms for output
channel;
Click function;
to enable this
Click
to reset each
channel; User can switch ft/cm/ms
measurement for delay.
– 14
FIR DSP SPEAKER PROCESSOR
4.3.6 DSP functions setting – MATRIX MIX
In the above figure, input channels (on top side) corresponds to output channels(on left side). 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.
– 15
FIR DSP SPEAKER PROCESSOR
4.3.7 DSP functions setting – COMPRESSOR
Soft knee: 0 to 30; Threshold: -90.0 to 24.0 dB; Attack: 1 to 2895 ms; Ratio: 1.0 to 100.0; Release: 1 to 2895 ms;
Click this function;
to enable
4.3.8 DSP functions setting – LIMITER
Threshold: 0.0 to 24.0dBu; Release: 1 to 2895 ms;
Click this function;
to enable
4.3.9 DSP functions setting – OUTPUT
– 16
FIR DSP SPEAKER PROCESSOR
Set phase of signal; Set mute of output channel; Set gain of output channel.
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 4 kinds of input signal in some products: ANALOG, DANTE network audio, AES digital audio, testing signal. 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
– 17
M Mute + Phase N Noise Gate E PEQ D Delay
4.4.3 Group and channels link
FIR DSP SPEAKER PROCESSOR
M Mute E PEQ D Delay C Compressor L Limiter + Phase
User can quickly set channels in groups for opening or closing mute, phase, noise gate, PEQ and delay function.
M Mute + Phase N Noise Gate E PEQ D Delay
Channels link for input
M Mute E PEQ D Delay C Compressor L Limiter + Phase
Channels link for output
When click link button, Channels Link window would show as below:
– 18
FIR DSP SPEAKER PROCESSOR
Select the corresponding channels to link, they will be in group for user to set parameter. 4.5 Menu – File
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. 4.6 Menu – Device (including Device lock)
– 19
FIR DSP SPEAKER PROCESSOR
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: provides user a quickly way to inquiry code of Center Control setting. More details, please refer to another user manual <Center Control Code User Manual>, it provides whole guide and codes for user to match every specific system.
Device locking User can set his own password of this device to protect audio project after
– 20
FIR DSP SPEAKER PROCESSOR
setting parameters. After unlock the device in software, user can clear password or reset the password. The password can be in four-digit format (0,1,2…9), so that user can use the control software or the front panel of device to unlock the password. If the device is locked, there is a icon showed in software and LCD display, as per Figure 7.18.1
Figure 7.18.1
Input the password in software to unlock the device
Input the password in LCD display to unlock the device When device is locking, user can press mute button of each channels in front panel. Press either of BACK, NEXT, MENU, ENTER, BYPASS, QUIT button, LCD will show interface to input password, press GAIN button to select digit, and press BACK or NEXT to select digit position. Then select “OK” and press ENTER to unlock device.
– 21
FIR DSP SPEAKER PROCESSOR
If wrong input, software will remind user there is only 5 times to input right password. More than 5 times, device can’t be unlock any more, user have to return this device back to dealer or factory. The dealer or factory will reset the device and clear all parameter settings.
Successfully input password and enter main interface
– 22
FIR DSP SPEAKER PROCESSOR
4.7 Menu – Connection
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. 4.8 Menu – Preset
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
– 23
FIR DSP SPEAKER PROCESSOR
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. 4.9 Menu – System
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.
– 24
FIR DSP SPEAKER PROCESSOR
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
Taps
48kHz Sampling
96kHz
256
2.67ms, LF 563Hz
512
5.33ms, LF 279Hz
768
7.99ms, LF 188Hz
1024
10.67ms, LF 141Hz
2048
21.33ms, LF 70Hz
Applications: Linear of the phase curve of the speaker;
– 25
1.33ms, LF 1125Hz 2.67ms, LF 558Hz 4.00ms, LF 375Hz 5.33ms, LF 281Hz 10.67ms, LF 141Hz
FIR DSP SPEAKER PROCESSOR
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: Measurement Microphone ×1
Audio Interface
×1
Windows PC
×1
(installed software including
Smaart, rePhase or FIR
Designer, MusicAllDSP)
FIR audio processor or DSP ×1
network power amplifier
Speaker
×1
Connection schematic diagram:
– 26
FIR DSP SPEAKER PROCESSOR
4.10.2 Using FIR DESIGNER in Mconsole to adjust FIR magnitude and phase Beside using third party software, Mconsole provides 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:
– 27
4.10.2.a FIR DESIGNER – Import
FIR DSP SPEAKER PROCESSOR
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.
– 28
FIR DSP SPEAKER PROCESSOR
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.
– 29
FIR DSP SPEAKER PROCESSOR
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.
– 30
FIR DSP SPEAKER PROCESSOR
4.11 Filters and application
In parameter EQ, this processor provides a variety of useful filters, including kinds of shelf, pass, and phase filters. Users can make full use of them in actual acoustic engineering.
4.11.1 Low shelf / high shelf filter
Using a shelf equalizer will allow more frequencies to remain intact, but still decay to a more acceptable level. This helps user retain the original sound, as well as the overall sound.
Low shelf in freq 1kHz, Q 1.00 Gain 5dB (yellow curve: phase)
Application: musical instruments
Freq (Hz): 20 to 22kHz Q: 0.25 to 1.00 Gain: -15.0 to 15.0 dB
4.11.2 LPF / HPF / Variable Q pass / Elliptic pass / Band pass / LP-1 / HP-1 filter
Using a shelf equalizer will allow more frequencies to remain intact, but still decay to a more acceptable level. This helps user retain the original sound, as well as the overall sound.
VariQ high pass in freq 1kHz, Q 3.0 (yellow curve: phase)
Freq (Hz): 20 to 22kHz Q: 0.40 to 128.00
– 31
FIR DSP SPEAKER PROCESSOR
4.11.3 Allpass-1 / Allpass-2 / Phase filter
Phase filter in freq 1kHz, Q 90 degree (yellow curve: phase)
Phase filter is a very useful filter type, without changing the frequency response, the user can adjust the original phase curve, optimize the phase coupling of part of the frequency band.
Freq (Hz): 20 to 22kHz Q: 0.25° to 179.00 ° Q value for setting degree
Allpass-1 in freq 1kHz (yellow curve: phase, 90 degree)
Application: different speaker
4.11.4 Band stop – Notch filter
Allpass-2 in freq 1kHz, Q 4.32 (yellow curve: phase, 180 degree)
Application: different speaker
Using a shelf equalizer will allow more frequencies to remain intact, but still decay to a more acceptable level. This helps user retain the original sound, as well as the overall sound.
Freq (Hz): 20 to 22kHz Q: 0.25 to 128.00
– 32
FIR DSP SPEAKER PROCESSOR
Notch filter in freq 1kHz, Q 4.32 (yellow curve: phase)
– 33
Documents / Resources
 |
MUSIC ALL DSP-48DT FIR DSP Speaker Processor [pdf] User Manual DSP-48DT FIR DSP Speaker Processor, DSP-48DT, FIR DSP Speaker Processor, Speaker Processor, Processor |
