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Alfatron DSP44-U Audio Digital Processor



The Alfatron ALF-DSP44-U is an 4 in / 4 out Audio Digital Signal Processor with Advanced audio processing capabilities and features 4 analogue inputs and 4 analogue outputs, 2 Channels of AEC processing, USB Audio, RS-232, RS-485, and IP control.

The Alfatron ALF-DSP44-U Audio Digital Signal Processor (DSP) is equipped with several core technical features to simulate the work of an audio engineer. The ALF-DSP44-U consists of 4 analogue inputs and 4 analogue outputs, USB Audio, RS-232, RS-485, and IP control. With one ADI SHARC 21489 processor, it is equipped with advanced audio processing modules including Acoustic Echo Cancellation (2 Channels), Noise Suppression, and Auto Mixing. The Analogue to Digital (A/D) and Digital to Analogue (D/A) convertors on the Input and output stage of the ALF-DSP44-U features 48kHz sampling rate and a bit rate of 24Bits, providing high definition audio sampling and processing. It also has a dynamic range of 110dB and a maximum level of +24dBu. It features input and output processing modules including: Expanders, Compressors, Acoustic Gain Compensation (AGC), Parametric EQ, Feedback Suppression, Automatic Noise Supression(ANC) and Delay. DSP-based audio management, routing, processing, and control, is facilitated via a computer running the GUI Software for the ALF-DSP44-U Hardware. The Alfatron DSP Controller software is a Windows-based application, which is used to configure and control the ALF-DSP44-U. The Alfatron DSP Controller is a full-feature application, including parameter adjustments and peripheral accessory settings of all modules, such as RS232, RS485, and click-and-drag panel configuration. The most interesting part is the user interface which allows the engineer to customize the user interface so that the integrator can edit it; or the onsite technicians, or end users can operate it. Advanced security features make it possible for the end user to only access the controls allowed by the engineer, or the designer.

Product Features:

  • Includes one ADI SHARC 21489 Audio Processor
  • 4 Balanced Mic / Line Inputs and 4 Balanced Line outputs on phoenix (PCB) connections
  • 2 Channels of AEC processing
  • 24Bit, 48kHz A/D and D/A convertors
  • 1ch. USB input and output
  • Advanced Audio Processing incl. AEC, Auto-Mixing, Noise Suppression, Matrix
  • Audio Processing Modules include:
    • Expanders
    • Compressors
    • Acoustic Gain Compensation (AGC)
    • Parametric EQ
    • Feedback Suppression
    • Delay
  • Software GUI Interface for easy setup and control of all DSP features.
  • RS-232, RS-485, and IP Control.


Technical Specifications

Processor ADI SHARC 21489(x1)
A/D and D/A Convertors


(Sampling rate / Digitalizing bit)

48kHz  / 24Bit
Input Gain 0 – 48dB in 6dB Steps
Phantom Power 48V
Frequency Response (20~20KHz) ±0.2dB
Maximum Level +24dBu
THD + Noise 0.003%@4dBu
Dynamic Range 110 dB
Background Noise (A-weighted) -91 dBA
Common Mode Rejection Ratio @60Hz 80dB
Channel Isolation @1KHz 108 dB
Input Impedance (Balanced Connection) 9.4KΩ
Output Impedance (Balanced Connection) 102Ω
System Delay <3ms
Inputs 4 Balance Line/Mic Inputs on Phoenix Connections
Outputs 4 Balance Line Outputs on Phoenix Connections
Audio Processing Functions



Acoustic Echo Cancellations (AEC) – 2 Channels


Automatic Gain Control (AGC)

Noise Suppression

Auto Mixer


8 Band Parametric EQ (Inputs & Outputs)

High / Low Shelf Filters


Compressor / Limiter

Feedback Suppressor


USB AUDIO 1 In – 1 Out
Control Options IP based PC software and host control.


Third party control for RS-485 and RS-232.


Working Power AC110~240V 5Hz-60Hz
Maximum Power Consumption <40W
Rack Space Required Half Rack
Dimensions (Width x Depth x Height) 215x184x45mm
Shipping Weight 1.8KG


Software Requirements

A Windows PC with:

  • Intel i5 processor or higher
  • 8 GB or higher memory
  • 1 GB free storage space
  • Windows 7 or higher version
  • Minimum 1920 x 1080 resolution
  • 24 bit or higher color
  • Network (Ethernet) port

Software Installation:

Visit the device web page address:

  1. Download software from the Alfatron website and install files.
  2. Double click the downloaded file and install by following the instructions on the screen.

After the software is installed, read other parts of the help file, or execute the software.

After the software is installed, use one of the following methods to open the software:

  1. Double Click Desktop Icon
  2. Open from Start menu
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