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ALP 280e
ALP 280e
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Digigram · ALP-X series · Low profile PCIe sound card
Multi-channel low profile PCIe sound card for recording analog inputs — rock-solid, pristine quality.
The Digigram ALP-280E has been designed for the acquisition of analog signals from eight line-level audio inputs, on professional PC-based audio systems running under Windows and Linux environments. This low profile card guarantees unrivaled reliability and utmost quality when audio recording applications are critical — audio production, recording and audio analysis markets.
- Iconic rock-solid & lifelong durability — designed for critical audio recording applications in audio production, recording and audio analysis markets.
- Pristine Digigram audio quality — SNR >115 dBA A-weighted on inputs, THD+N <-98 dB, with 24-bit / 192 kHz A/D and D/A converters.
- Zero latency FPGA-based 16×10 mixer — 16 inputs (8 analog + 8 software playback channels) and 10 outputs (2 analog + 8 software recording channels). Each output channel has its own mix from the 16 inputs.
- 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.
- Hiccup free reliability — low profile card with standard and low profile brackets included. PCI Express x1 (x2, x4, x8, x16 compatible).
- 8 GPIs and 8 GPOs — 8 dry contact GPIs and 8 relay GPOs (0.5 A, 48 VCC).
- 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 | 8 balanced line level inputs |
| Analog outputs | 2 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 |
| On-board mixer | Zero latency FPGA-based 16×10 |
| 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 2019) — ASIO, WASAPI/DirectSound
- Linux — Ubuntu 20.04 kernel 5.15 · Debian 11 kernel 5.10 · RHEL 9 kernel 5.14 — 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 ALP-280E?
A multi-channel low profile PCIe sound card designed for the acquisition of analog signals from 8 line-level audio inputs on professional PC-based audio systems running under Windows and Linux. Ideal for audio production, recording and audio analysis markets.
How many channels does the ALP-280E provide?
8 balanced analog line inputs, 2 servo-balanced analog line outputs, 8 GPIs and 8 GPOs. The on-board zero latency FPGA mixer features 16 inputs and 10 outputs.
What PCIe slot does the ALP-280E require?
It uses a PCIe x1 lane and is compatible with x2, x4, x8 and x16 slots. The low profile form factor is included with both standard and low profile brackets.
Can I use multiple ALP-280E 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 ALP-280E work with Linux?
Yes — with ALSA and Libgpiod drivers on Ubuntu 20.04 (kernel 5.15), Debian 11 (kernel 5.10) and RHEL 9 (kernel 5.14). One driver package covers both Windows and Linux with multi-application and multi-card API available.
What synchronization sources does the ALP-280E support?
Internal clock, AES11 input and Word Clock input — all supporting sampling rates from 11.025 kHz up to 192 kHz. Inter-board clock synchronization is available when connecting multiple ALP-X cards.
What cables and connectors are included?
Two 1m breakout cables are included: one analog cable with 8 female XLR and 2 male XLR connectors, and one digital cable with 1 XLR for AES11 sync, 2 BNCs for Word Clock I/O, and 2× D-Sub 25 for GPIs and GPOs.
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