The latest generation stereo sound card designed for the most demanding professional audio applications.


Universally acclaimed, unchanged Digigram features are still up to meet your challenges. Your favourite, trusted PCX and VX cards essentials still fuel the new Digigram ALP-X range. 

Same quality, same high standards. A new technology core for this new cards range will push back the limits, offer enhanced performances and simplify users’ daily routines with ALP-X sound cards.

ALP221e  is a low profile PCIe stereo sound card designed for operating in continuous 24/7/365 use-environments, as part of professional audio applications based on Windows or Linux operating systems. The card offers digital audio connectivity, and features an on-board 6×6-channel mixer that allows for the routing and mixing inputs to the outputs.

The low latency drivers are multicard (up to 8 ALP cards) and multi-client.




For Windows
and Linux

Iconic Rock-solid
& life-long

Pristine Digigram
sound quality


Hiccup free reliability


Outstanding audio quality and performance

Made for regular application or custom design with help of Digigram control API

Rock-solid, life-long, hiccup free reliability
Fits in any type of PC / workstation / server with a PCIe slot
Drivers evolve with Windows and Linux updates



L: 168 mm x H: 69 mm x l: 20 mm L: 6.6 inch; H: 2.7 inch; l: 0.8 inch 

Form Factor
Low profile
(standard and low profile brackets included)

Expansion Bus
PCI Express TM (PCIe TM) x1 (x2, x4, x8, x16 compatible) 


Supported OS
Windows: as of Windows 10 and Server 2016
Linux: from the 64-bit Kernel 4.19 onwards (according to  

Windows: Asio, Wasapi/DirectSound
Linux: Alsa – The Alsa driver is currently supplied by Digigram so that you can compile it for your Linux distribution.

One Driver Package 
Multi-application and multi-card API available 

Control panel

Digigram ALP-X ASIO Settings (On Windows)
• Asio Control Panel: up to 8 ALP-X cards
(intercard synchronization)
• Select I/Os used through ASIO
(others can be used through Wasapi)

Digigram ALP-X Manager (On Windows)
• A unique control panel for the whole ALP-X range
• Manages up to 8 ALP-X cards

Main functions
Zero latency FPGA-based mixer
Adjustment of input and output levels
Mixing before monitoring and recording
Sync selection


Hardware Specifications


1 stereo AES3 input
Adjustable digital gain: from -90 dB to +12 dB, in 0.1 dB steps
Sample rate (kHz): 32, 44.1, 48, 64, 88.2, 96, 128, 176.4, 192
Hardware Sample Rate Converter frequency ratio: from 1:8 to


1 stereo AES3 output
Adjustable output gain: from -90 dB to +12 dB, in 0.1 dB steps
Sample rate (kHz): 32, 44.1, 48, 64, 88.2, 96, 128, 176.4, 192


PCM (8, 16, 24, 32 and 32 float bits), Float IEEE754


Breakout cable
Total breakout cable length: 1 m
XLRs for audio I/Os 

Inter board synchronization
Headphones: 3.5 mm TRS female jack

  • Internal clock (kHz)
    11.025, 16, 22.05, 24, 32, 44.1, 48, 64, 88.2, 96, 128, 176.4, 192
  • Intercard clock* (possibility to connect up to 8 ALP-X cards
    linked with an inter-board sync cable)

+ AES3 input with SRC


Sound cards

Which Linux Distribution are supported for sound cards ?

LoLa soundcards and multichannels VX/PCX series are supported on every Linux distribution, as the ALSA driver is part of the kernel.

The VX and PCX stereo cards have precompiled versions for Debian, Ubuntu, CentOs, Fedora, and OpenSuse-based distributions. For the LX series, the following distributions are supported: Ubuntu LTS / Debian LTS / CentOS 7.

For other Linux distributions, we propose a service for providing an adequate compiled and installable driver package. UAX and Cancun series will work on every Linux distribution.

My sound card is not detected by Windows

Make sure that you downloaded the lasted driver on our website. Indeed, from time to time we have to make component updates that require a new driver.