• Iconic rock-solid & life-long reliability — designed for mission critical applications in broadcast, utility, public safety and transportation markets.
• Pristine Digigram sound quality — SNR >115 dBA A-weighted on inputs, THD+N <-98 dB, with 24-bit / 192 kHz A/D and D/A converters.
• 4 analog + 4 digital I/O channels — four balanced analog line inputs, two stereo AES3 inputs, four balanced analog outputs and two stereo AES3 outputs — total 16 I/O channels.
• Zero latency FPGA-based 16×16 mixer — 16 I/O channels (4 analog, 4 AES3, 8 software play/record). Each of the 16 output channels has its own mix from the 16 inputs. 16 mix buses.
• 8 stereo software devices — for playout and recording.
• 8 GPIs and 8 GPOs — 8 dry contact GPIs and 8 relay GPOs (0.5 A, 48 VCC).
• Multi-applications — one driver package with multi-application and multi-card API available. Up to 8 ALP-X cards manageable from one unified control panel.
• Inter-board synchronization — possibility to connect up to 8 ALP-X cards linked with an inter-board sync cable.

Parameter	Value
Form factor	Low profile — standard and low profile brackets included
Expansion bus	PCI Express x1 (x2, x4, x8, x16 compatible)
Dimensions	L: 168 mm × H: 69 mm × l: 20 mm
Analog inputs	4 balanced line inputs
Analog outputs	4 servo-balanced line outputs
A/D & D/A converters	24 bits / 192 kHz
Max input level / impedance	+24 dBu / >10 kΩ
Max output level / impedance	+24 dBu / <100 Ω
Analog gain (inputs)	-24 dB to +16 dB in 0.5 dB steps
Digital gain (inputs)	-90 dB to +12 dB in 0.1 dB steps
Digital gain (outputs)	-90 dB to +12 dB in 0.1 dB steps
Digital inputs	2 stereo AES3 inputs — sample rate 32 to 192 kHz
Digital outputs	2 stereo AES3 outputs — sample rate 32 to 192 kHz
Hardware SRC ratio	1:8 to 7.5:1
On-board mixer	Zero latency FPGA-based 16×16 — 16 mix buses
Software devices	8 stereo devices for playout and recording
GPIs / GPOs	8 dry contact GPIs / 8 relay GPOs (0.5 A, 48 VCC)
Sync inputs	1× AES11 + 1× Word Clock input
Word Clock output	1×
Sample format	PCM (8, 16, 24, 32 and 32 float bits), Float IEEE754

Analog audio performance	Inputs	Outputs
SNR A-weighted	>115 dBA	>109 dBA
SNR unweighted	>112 dB	>106 dB
THD+N @22dBu / 1kHz	<-98 dB @24dBu	<-96 dB @24dBu
Crosstalk @1 kHz / @15 kHz	-128 dB / -107 dB	-127 dB / -112 dB
Frequency response @48kHz	±0.83 dB	±0.57 dB
Channel phase @1 kHz	<0.01°	<-0.02°

• Windows (from Windows 10 and Server 2016) — ASIO, WASAPI/DirectSound
• Linux (from Linux Kernel 4.9) — ALSA, Libgpiod
• One driver package — multi-application and multi-card API available
• Digigram ALP-X Manager (Windows) — one unified control panel for the whole ALP-X range, manages up to 8 ALP-X cards
• Digigram ALP-X ASIO Settings (Windows) — intercard synchronization, select I/Os through ASIO (others can be used through WASAPI)
• Inter-board synchronization — up to 8 ALP-X cards via inter-board sync cable

What is the Digigram ALP442e?

The latest generation versatile multichannel PCIe sound card for professional PC-based audio systems. Ideally suited for mission critical applications in broadcast, utility, public safety and transportation markets.

How many I/O channels does the ALP442e provide?

4 balanced analog line inputs, 2 stereo AES3 inputs, 4 balanced analog line outputs and 2 stereo AES3 outputs — total 16 I/O channels. Plus 8 GPIs and 8 GPOs.

What is the on-board mixer configuration?

A zero latency FPGA-based 16×16 mixer with 16 I/O channels (4 analog, 4 AES3, 8 software play/record) and 16 mix buses. Each of the 16 output channels has its own mix from the 16 inputs.

What PCIe slot does the ALP442e require?

It uses a PCIe x1 lane and is compatible with x2, x4, x8 and x16 slots. Low profile form factor with standard and low profile brackets included.

Can I use multiple ALP442e cards in one system?

Yes. Up to 8 ALP-X cards can be connected via an inter-board sync cable and managed from Digigram's unified ALP-X Manager control panel on Windows.

Does the ALP442e work with Linux?

Yes — with ALSA and Libgpiod drivers from Linux Kernel 4.9. One driver package covers both Windows and Linux with multi-application and multi-card API available.

What cables and connectors are included?

Two 1m breakout cables: one analog cable with XLR connectors, and one digital cable with XLR for I/Os and AES11 sync input, BNCs for Word Clock I/O, and 2× D-Sub 25 for GPIs and GPOs.