Digigram ALP222e Manuale utente
User Manual – ALP222e
User Manual
ALP222e
Professional stereo sound card
September 2022
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User Manual – ALP222e
1- INTRODUCTION
This document describes the installation and use of the PCI Express DIGIGRAM ALP222e sound card
under Windows and Linux.
This stereo card is part of the ALP-X professional sound cards, which also includes multi-channel
cards (4, 8 channels).
Copyright 2022 Digigram. All rights reserved.
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, and ALP222e are trademarks or brand names of Digigram Digital. All other
marks are owned by their respective companies.
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User Manual – ALP222e
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.
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User Manual – ALP222e
TABLE OF CONTENTS
1- INTRODUCTION 2
2- IMPORTANT NOTICE 3
3- BOX CONTENTS 7
4- GENERAL CHARACTERISTICS 8
4.1 Main hardware characteristics 8
4.2 Main software characteristics 8
4.3 Routing audio streams in the card 8
5- REQUIRED CONFIGURATION 10
5.1 Required hardware configuration 10
5.2 Necessary software configuration under Windows 11
5.3 Necessary software configuration under Linux 11
6- HARDWARE INSTALLATION 12
6.1 Preparing the card 12
6.2 Installing the card 12
6.3 State of internal LED 12
7- SOFTWARE INSTALLATION UNDER WINDOWS 13
7.2 Updating the driver version 14
7.3 Updating the firmware 14
7.4 Verifying the card installation 15
7.4.1Presence of playback and recording devices 15
7.4.2 Card detected by the Digigram ALP-X Manager application 16
7.4.3 Card availability under ASIO 16
8- UNINSTALLING THE DRIVER UNDER WINDOWS 18
9- CONFIGURING THE CARD UNDER WINDOWS VIA THE ALP-X MANAGER APPLICATION 19
9.1 Sampling clock management 19
9.2 Managing input and output levels 21
9.3 Managing the routing and mixing of input signals 24
9.4 Display of GPIOs and control of GPOs 26
9.5 Creating, saving and loading setting sessions 27
9.6 Updating the firmware 27
9.7 Keyboard shortcuts 28
10- ASIO CONTROL PANEL for Windows 30
11- SOFTWARE INSTALLATION UNDER LINUX 32
11.1 Automatic installation 32
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User Manual – ALP222e
11.2 Building and installing the driver manually 32
12- CONFIGURING UNDER LINUX VIA AMIXER 33
12.1 Diagram of the inputs towards outputs chain 33
12.2 Description of controls 34
12.3 Setting of ALP222e parameters from amixer 42
13- SPECIFICATIONS 55
13.1 Configuration 55
13.2 Inputs 56
13.3 Outputs 57
13.4 Audio characteristics 58
13.5 Analog performances 58
13.6 Frequency converter performance (SRC) 58
13.7 Connectors 58
13.8 Development environment 59
14- APPENDICES 60
14.1 ALP222e functional diagram 60
14.2 LED 61
14.3 Connectors and switches 62
14.5 Breakout cable diagram 63
14.4 Pinout of the breakout cable connector 64
14.5 How to use GPI’s and GPO’s 66
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User Manual – ALP222e
3- BOX CONTENTS
Thank you for purchasing a DIGIGRAM sound card in the ALP-X range.
The box contains:
●an ALP222e sound card equipped with a standard height bracket (full height: 120 mm),
●a low-profile bracket (79.2 mm) that can be fitted instead of the full-height bracket,
The breakout cable that bears the XLR and BNC connectors is available as an option.
Please contact your card supplier to acquire the Digigram-certified cable.
To download the most recent card driver, please visit the digigram website at:
www.digigram.com/support/drivers-firmware-downloads/
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User Manual – ALP222e
4- GENERAL CHARACTERISTICS
ALP222e is a PCI EXPRESSTM x1 audio card. It can be inserted into and therefore operate in PCIe® x1,
x2, x4, x8 or x16 slots.
4.1 Main hardware characteristics
●2 balanced analog inputs (can be used unbalanced) with software-adjustable analog gain
and a maximum input level of +24 dBu.
●2 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).
●1 stereo AES3 digital input, 32 kHz to 192 kHz, with high quality hardware sample rate
converter (SRC).
●1 AES11 synchronisation input (up to 192 kHz)
●1 AES3 digital stereo output (up to 192 kHz)
●1 mini jack stereo headphone output, which replicates the analog outputs.
●1 word clock input/output (up to 192 kHz)
●2 GPI dry contacts and 2 GPO relays
●Inter-card synchronisation
4.2 Main software characteristics
●Low latency multi-card drivers
●Wasapi/DirectSound and ASIO application programming interfaces under Windows, and Alsa
and libgpio for Linux
●Simultaneous acquisition and playback in PCM (8, 16 and 24 bit), Float IEEE754
●On-board mixing of physical audio inputs and software "playback" devices to physical audio
outputs and software recording devices.
●"ALP-X Manager" application installed with the driver, to control the card settings:
- clock source
- frequency of the fallback internal clock
- input and output gains, RMS VU-meters with peak-meters
- 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 card incorporates an on-board mixer in an FPGA component. This is a mixer with 8 mono
inputs (4 stereo) and 8 mono outputs (4 stereo).
The mixer captures the 4 physical input channels of the card (2 analog channels and 2 AES3
channels) and the 4 channels of the playback devices.
The mixer restores 8 audio channels, respectively to the 4 physical outputs of the card (2 analog
channels and 2 AES3 channels) and the 4 recording device channels.
The mixer can therefore be configured to perform the mixing and the routing of the 8 input
channels to the 8 output channels (8 mix sums).
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User Manual – ALP222e
Principle of the ALP222e on-board mixer
Note: the stereo headphone output replicates the analog outputs.
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User Manual – ALP222e
5- REQUIRED CONFIGURATION
5.1 Required hardware configuration
There are no particular hardware restrictions in terms of PC on using the ALP card and its driver. The
PC can have standard height or low profile PCIe card slots. The ALP card can in particular be used in
2U racks or reduced size PC, by using the smaller bracket instead of the standard height bracket that
is fitted by default.
A PCI EXPRESSTM (PCIe®) x1, x2, x4, x8 or x16 slot must be available to plug in the card.
The processor power and memory required depend mainly on the operating system and the
applications used on the PC.
The sleep mode for the PCIe bus must be disabled.
Go to Windows Settings, System, and select “Power & sleep”.
Select Never” for the option “Put the computer to sleep”.
On the same window, click on “Additional power settings”.
Click on “Change plan settings” in
front of “Balanced
(recommended)”
Select “Change advanced power
settings”.
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User Manual – ALP222e
Select “PCI Express”, “Link State
Power Management”, and select
“Off” for the setting.
Click on Ok to
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