Digigram ALP442e Bedienungsanleitung

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

User Manual

ALP442e & ALP442e-MIC

ALP882e & ALP882e-MIC

Professional multi-channel sound card

March 2023

Author

Date

Status

SBT

15/11/22

En rédaction

 
User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC 

TABLE OF CONTENTS 
 
INTRODUCTION 5
IMPORTANT NOTICE 6
BOX CONTENTS 7
GENERAL CHARACTERISTICS 7
1 Main hardware characteristics 7
2 Main software characteristics 7
3 Routing audio streams in the card 8
REQUIRED CONFIGURATION 11 
1 Required hardware configuration 11 
2 Necessary software configuration under Windows 13 
3 Necessary software configuration under Linux 13 
HARDWARE INSTALLATION 14 
1 Preparing the card 14 
2 Installing the card 14 
3 State of internal LED 14 
SOFTWARE INSTALLATION UNDER WINDOWS 15 
1 Very first installation 15 
2 Updating the driver version 16 
3 Updating the firmware 16 
4 Verifying the card installation 17 
4.1 Presence of playback and recording devices 17 
4.2 Card detected by the Digigram ALP-X Manager application 18 
4.3 Card availability under ASIO 18 
5 Replacing a card 20 
6 Changing the order of installed cards 20 
UNINSTALLING THE DRIVER UNDER WINDOWS 20 
CONFIGURING THE CARD UNDER WINDOWS VIA THE ALP-X MANAGER APPLICATION 22 
1 Sampling clock management 22 
2 Managing input and output levels 24 
3 Managing the routing and mixing of input signals 29 
4 Display of GPIOs and control of GPOs 32 
5 Creating, saving and loading sessions 32 
6 Updating the firmware 32 
7 Keyboard shortcuts 34 
ASIO CONTROL PANEL for Windows 35 

 
User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC 

SOFTWARE INSTALLATION UNDER LINUX 36 
1 Automatic installation 36 
2 Building and installing the driver manually 37 
CONFIGURING ALP882e and ALP882e-Mic UNDER LINUX VIA AMIXER 38 
1 Diagram of the audio inputs towards audio outputs chain 38 
2 Description of the controls 42 
2.1 Clock, SRCs, phantom power (ALP882e-MIC) 42 
2.2 Gains on the physical inputs 45 
2.3 Gains on the application DAW inputs (play from software applications) 47 
2.4 Gains on the physical outputs 48 
2.5 Gains on the DAW outputs (recording from software applications) 49 
2.6 Gains in the matrix applied to a Play DAW input 49 
2.7 Gains in the matrix applied to the signal from an analog input 52 
2.8 Gains in the matrix applied to the signal from a digital input 54 
2.9 Rules to calculate the gain values 55 
2.10 Example of gains for the calibration of input and output signal levels 57 
2.11 GPIOs 57 
SPECIFICATIONS 58 
1 Configuration 58 
2 Inputs 58 
3 Outputs 59 
4 Audio characteristics 59 
5 Analog performances 59 
6 Sample rate converters (SRC) 60 
7 Connectors 60 
8 Development environment 60 
APPENDICES 61 
1 ALP442e & ALP442e-MIC functional diagram 61 
2 ALP882e & ALP882e-MIC functional diagram 62 
3 LED 63 
4 Connectors and switches 63 
5 How to use the GPIOs 64 
5.1 GPIs 64 
5.2 GPOs 64 
6 Cables for ALP442e and ALP442e-MIC 65 
6.1 Cable for analog I/Os 65 
6.1.1 Diagram 65 
6.1.2 Pinout 65 
6.2 Cable for digital I/Os 67 
6.2.1 Diagram 67 
6.2.2 Pinout 68 

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

14.7 Cables for ALP882e and ALP882e-MIC 70

14.7.1 Cable for analog I/Os 70

14.7.1.1 Diagram 70

14.7.1.2 Pinout 71

14.7.2 Cable for digital I/Os 73

14.7.2.1 Diagram 73

14.7.2.2 Pinout 74

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

1 INTRODUCTION

This document describes the installation and use of the following Digigram multichannel PCI Express

cards under Windows and Linux: ALP442e, ALP442e-MIC, ALP882e, and ALP882e-MIC.

These cards are part of the ALP-X professional sound cards range.

No part of this manual may be reproduced without the prior consent of Digigram. This reservation includes

photocopying, translating and/or reformatting the information contained in this manual.

Everything possible has been done to ensure the greatest accuracy, however Diagram cannot be held liable

for any error or omission and reserves the right to make modifications and improvements without prior

notice.

Digigram and the Digigram logo, ALP442e, ALP442e-MIC, ALP882e and ALP882e-MIC are trademarks or

brand names of Digigram Digital. All other marks are owned by their respective companies.

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

2 IMPORTANT NOTICE

Certifications

The product is currently being certified.

This product has been designed in accordance with the following standards:

●EMC Directive 2014/30/EU.

●FCC Rules Part 15, Subpart B.

To ensure compliance with the standards listed above, the following rules must be followed:

●The cable supplied must not be modified.

●The additional cables used must have their respective shielding connected at each end.

Caution

An electrostatic discharge (ESD) can damage the card components. Take the

following precautions to avoid such damage when handling the card:

Connect the card and everything entering into contact with it to the earth potential by providing a

conductive surface and discharge paths. Take these precautions as a minimum:

●Unplug all power and signal sources.

●Place the card on an earthed conductive work surface.

●Connect to the earth potential using an anti-static strap or by holding an earthed object.

●Earth all the tools entering into contact with the card.

Given the shortened length of the PCI EXPRESSTM connector and the resulting lack of

mechanical stability, we strongly advise against transporting the cards installed in a computer,

unless its chassis or case has a device for holding the card firmly in place to avoid material

damage.

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

3 BOX CONTENTS

Thank you for purchasing a DIGIGRAM sound card in the ALP-X range.

The box contains:

●The ALP442e, or ALP442e-MIC, or ALP882e, or ALP882e-MIC sound card equipped with a low-

profile bracket (79.2 mm),

●a standard height bracket (full height: 120 mm) that can be fitted instead of the low profile

one.

The two breakout cables that bear the XLR and BNC connectors are available as an option. One cable

supports the analog I/Os, the other one supports the digital I/Os and clocks.

Please contact your card supplier to acquire the Digigram-certified cables.

4 GENERAL CHARACTERISTICS

ALP442e, ALP442e-MIC, ALP882e and ALP882e-MIC are PCI EXPRESSTM x1 sound cards. They can be

inserted into and therefore operate in PCIe® x1, x4, x8 or x16 slots.

4.1 Main hardware characteristics

●4 (ALP442e/ALP442e-MIC) or 8 (ALP882e/ALP882e-MIC) balanced analog inputs with:

- software-adjustable analog gain and a maximum input level of +24 dBu.

- switchable 48V phantom power on each input (ALP442e-MIC and ALP882e-MIC)

These inputs can be used in unbalanced mode (“-” signal to be connected to the ground).

●8 electronically balanced analog outputs, with a maximum output level of +24 dBu.

(Electronically balanced outputs can process either balanced or unbalanced lines without loss

of level).

●2 (ALP442e/ALP442e-MIC) or 4 (ALP882e/ALP882e-MIC) stereo digital AES3 inputs, 32 kHz to

192 kHz, each with a high quality hardware sample rate converter (SRC).

●2 (ALP442e/ALP442e-MIC) or 4 (ALP882e/ALP882e-MIC) AES3 stereo digital AES3 outputs (up

to 192 kHz)

●1 AES11 synchronisation input (up to 192 kHz)

●1 word clock input/output (up to 192 kHz)

●8 GPI dry contacts and 8 GPO relays

●Inter-card synchronisation

4.2 Main software characteristics

●Low latency multi-card drivers

- Wasapi/DirectSound and ASIO application programming interfaces under Windows

- Alsa and libgpio for Linux

●ALP442e / ALP442e-MIC: 8 playback channels / 8 recording channels

ALP882e / ALP882e-MIC: 16 playback channels / 16 recording channels

●Simultaneous acquisition and playback in PCM (8, 16 and 24 bit)

●On-board mixing of physical audio inputs and software "playback" devices to physical audio

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

outputs and software recording devices.

●"ALP-X Manager" application installed with the driver, to control the card settings:

- clock source (internal, wordclock, AES11, AES3 input)

- frequency of the fallback internal clock

- input and output gains and VU-meters

- 48V phantom power switches (for -MIC cards)

- routing of inputs to outputs

●API for implementing the management of the card settings in a software application.

4.3 Routing audio streams in the card

The ALP cards incorporate an on-board mixer in an FPGA component.

On ALP442e and ALP442e-MIC, this is a mixer with 16 mono inputs (8 stereo) and 16 mono

outputs (8 stereo). The mixer captures the physical input channels of the card (4 analog

channels and 4 AES3 channels) and the 8 channels of the playback devices.

The mixer restores 16 audio channels, respectively to the 8 physical outputs of the card (4

analog channels and 4 AES3 channels) and the 8 recording device channels.

The mixer can therefore be configured to perform the mixing and the routing of the 16 input

channels to the 16 output channels (16 mix sums).

4 analog input

ch.

8 DAW playback channels

4 digital input ch.

16 x 16 on-board

mixer

(16 mix sums)

4 analog output

ch.

8 DAW recording channels

4 digital output

ch.

ALP442e & ALP442e-

MIC

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

On ALP882e and ALP882e-MIC, this is a mixer with 32 mono inputs (16 stereo) and 32 mono

outputs (16 stereo).

The mixer captures the physical input channels of the card (8 analog channels and 8 AES3

channels) and the 16 channels of the playback devices.

The mixer restores 32 audio channels, respectively to the 16 physical outputs of the card (8

analog channels and 8 AES3 channels) and the 16 recording device channels.

The mixer can therefore be configured to perform the mixing and the routing of all the 32 input

channels to the 32 output channels (32 mix sums).

The following diagrams show a more detailed view of the workflows in the card, with the input

and output gains.

8 analog input

channels

16 DAW playback

channels

8 digital input

channels

32 x 32 on-board

mixer

(32 mix sums)

8 analog output

channels

16 DAW recording

channels

8 digital output

channels

ALP882e & ALP882e-

MIC

User Manual for ALP442e & ALP442e-MIC, ALP882e & ALP882e-MIC

Rec

Playout

applicat

ion(s)

ANA

AES

Acquis

ition

applic

ations

AES3

Analog

Playback

16 x

mixer

ANA

Analog

AES

AES3

Rec

Anal

Digit

ANA

AES

ANA

AES

Playback

Rec

ALP442e and

ALP442e-MIC

48V

and

gain

ALP442

e only

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