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Version: ALF-DSPxxxxx - V2.0 19072022

ALF-DSP44-U

4x4 Digital Sound Processor

ALF-DSP44-UD

4x4 Digital Sound Processor with Dante

ALF-DSP88-U

8x8 Digital Sound Processor

ALF-DSP88-UD

8x8 Digital Sound Processor with Dante

ALF-DSP USER GUIDE

ALF-D SP 88-U

-2-

Table of Contents

1. Hardware.............................................................................................. 5

1.1 Safety Instructions .................................................................................................................................... 5

1.2 Audio Wiring Reference............................................................................................................................ 6

1.3 Specifications............................................................................................................................................ 7

1.4 Mechanical................................................................................................................................................ 8

1.5 Front Panel ............................................................................................................................................... 8

1.6 Rear Panel ................................................................................................................................................ 8

2. Technology Overview .......................................................................... 9

2.1 Introduction to DSP Technology............................................................................................................... 9

2.2 Audio Input Section .................................................................................................................................. 9

2.3 Audio Output Section............................................................................................................................ 100

2.4 Floating Point DSP ............................................................................................................................... 111

2.5 Audio Flow ............................................................................................................................................ 122

2.6 Typical System Application .................................................................................................................. 133

3. Software ........................................................................................... 133

3.1 Software Installation ............................................................................................................................. 133

3.2 Using the Software ................................................................................................................................. 14

3.3 Module Editing …………………………………………………………………………………………………………….…………14

3.4 Audio Module Parameters ...................................................................................................................... 15

3.4.1 Input Source .................................................................................................................................. 155

3.4.2 Expander ....................................................................................................................................... 166

3.4.3 Compressor & Limiter ...................................................................................................................... 17

3.4.4 Automatic Gain Control

................................................................................................................... 18

3.4.5 Equalizers ........................................................................................................................................ 19

3.4.6 Graphic Equalizer.…………………….…………………………………………………………….……..20

3.4.7 Feedback Suppressor ..................................................................................................................... 21

3.4.8 Noise Gate ................................................................................................................................... 2422

3.4.9 Ducker ........................................................................................................................................... 243

3.4.10 Ambient Noise Compensation (ANC).......................................................................................... 243

3.4.11 AutoMixer....................................................................................................................................... 24

3.4.12 Acoustic Echo Cancelation............................................................................................................ 26

ALF-D SP 88-U

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3.4.13 Noise Suppression ........................................................................................................................ 27

3.4.14 Matrix ............................................................................................................................................. 27

3.4.15 High & Low Pass Filter .................................................................................................................. 27

3.4.16 Delay.............................................................................................................................................. 28

3.4.17 Output ............................................................................................................................................ 29

3.4.18 USB Interface ................................................................................................................................ 29

3.4.19 Camera Tracking ........................................................................................................................... 31

3.5 Setting Menu .......................................................................................................................................... 32

3.5.1 File Menu ......................................................................................................................................... 32

3.5.2 Device Setting.................................................................................................................................. 32

3.5.3 GPIO Setting.................................................................................................................................... 33

3.5.4 Group Setting................................................................................................................................... 35

3.5.5 Panel Setting ................................................................................................................................... 36

3.5.6 Dante Settings ……………………………………………………………………………………………………………….. 38

3.5.7 Help Menu ....................................................................................................................................... 41

4. Control ................................................................................................ 42

4.1 External Control Programmer................................................................................................................. 42

4.2 Control Protocol ...................................................................................................................................... 42