Audio Science ASI5811


This entry level audio card is perfect for web broadcasters, production studios and most small broadcasters. There are four playback streams and one record stream with a digital and analog input and output too. The ASI5811 also offers a dedicated microphone input with Limiter / Compressor and is a perfect card to add to your existing automation computer to add voice-tracking capability.



The ASI5811 is a professional PCI audio adapter designed for use in radio broadcast production. 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 both a balanced analog output and an AES/EBU digital output. Also included is a microphone input, with low noise pre-amp and a 48V phantom supply.

The ASI5811 is a PCI Express (PCIe) adapter. Additionally, the ASI5811 makes available two opto inputs and two relay outputs via a second bracket attached to the ASI5811 using a 10-pin ribbon cable. (supported in Simian 2.1.1 and WaveCart 5.0.0 and above)

Additional information

Weight 3 lbs


  • Four stereo streams of PCM playback
  • Two stereo streams of PCM record
  • Balanced stereo analog input and output
  • PCIe interface
  • Two opto inputs and two relay outputs via a second bracket
  • AES/EBU or S/PDIF digital input and output (software selectable)
  • Low noise microphone input with 48V phantom supply and DSP based compressor/limiter and 3 band equalizer
  • 24bit analog-to-digital and digital-to-analog converters – 100dB SNR and 0.0025% THD+N
  • 11 to 96kHz 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
  • Windows XP, Server 2003, Server 2008, 7 and Linux software drivers available

Block Diagram

Technical Data

 ASI5811 Data Sheet

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