ASI5812 PCI Express Linear Sound Card

The ASI5812 is a professional PCI Express audio adapter designed for use in radio broadcast FM MPX generation. The adapter offer two stereo record streams from either a balanced analog input or AES/EBU digital input and four stereo play streams mixed to a balanced analog output and two AES/EBU digital outputs. The second AES/EBU output includes a Sample Rate Converter (SRC) and independent sample rate clock.

The adapter also includes GPIO in the form of four opto-isolated inputs and two relay isolated outputs.


  • Four stereo streams of PCM playback
  • Two stereo streams of PCM record
  • Balanced stereo analog input and output
  • PCIe interface
  • GPIO: Four opto inputs and two relay outputs
  • AES/EBU or S/PDIF digital input and output (software selectable)
  • 24bit analog-to-digital and digital-to-analog converters - 100dB SNR and 0.0025% THD+N
  • 11 to 192kHz sample rates
  • MRX™ multi rate mixing technology supports digital mixing of multiple sample rates
  • SoundGuard™ transient voltage suppression protects against lightning and other high voltage surges on all I/O
  • Up to 8 cards in one system
  • Half-height design and included mounting bracket allow for installation in small form factor systems
  • Windows and Linux software drivers available
ASI5812 Datasheet
Cable options

Windows Combo Drivers
Linux HPI and ALSA Drivers

Notes & Errata:

  • ASI5812 adapter REQUIRES a driver version of 4.20.05 or later.  Please download the latest version using the links above.