General Characteristics; Main Hardware Characteristics; Main Software Characteristics; Routing Audio Streams In The Card - Digigram ALP221e User Manual

User Manual – ALP221e

4 GENERAL CHARACTERISTICS

ALP221e is a PCI EXPRESS
x1, x2, x4, x8 or x16 slots.

4.1 Main hardware characteristics

1 stereo AES3 digital input, 32 kHz to 192 kHz, with high quality hardware sample rate
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converter (SRC).
1 AES3 digital stereo output (up to 192 kHz)
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1 mini jack stereo headphone output
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Inter-card synchronisation
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4.2 Main software characteristics

Low latency multi-card drivers
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Wasapi/DirectSound and ASIO application programming interfaces under Windows, and Alsa
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and libgpio for Linux
Simultaneous acquisition and playback in PCM (8, 16 and 24 bit), Float IEEE754
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On-board mixing of physical audio inputs and software "playback" devices to physical audio
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outputs and software recording devices.
"ALP-X Manager" application installed with the driver, to control the card settings:
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- clock source
- frequency of the fallback internal clock
- input and output gains, phantom power (ALP222e-Mic), RMS VU-meters with peak-meters
- routing of inputs to outputs
API for implementing the management of the card settings in a software application.
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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 6 mono
inputs (3 stereo) and 6 mono outputs (3 stereo).
The mixer captures the 2 physical input channels of the card (2 AES3 channels) and the 3 channels of
the playback devices.
The mixer restores 6 audio channels, respectively to the 2 physical outputs of the card (2 AES3
channels) and the 2 recording device channels.
The mixer can therefore be configured to perform the mixing and the routing of the 6 input
channels to the 6 output channels (6 mix sums).
TM x1 sound card. They can be inserted into and therefore operate in PCIe®
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