Intel® Processor and Intel® Core™ i3 N-Series

Datasheet, Volume 1 of 2

ID 759603
Date 01/04/2023
Version 001
Document Table of Contents

USB Audio Offload Support

USB Audio Offload provides audio mixing / processing support for USB audio endpoint connected through the xHCI Controller. This is aimed at providing a universal audio offload power benefit across various audio devices connected to the platform and USB audio usage is expected to gain more popularity with the introduction of USB Type-C* connector. These USB audio endpoint will be enumerated by the xHCI Controller SW and only the audio streaming path is peer to the Audio DSP subsystem for DSP FW mixing / processing support. USB Audio Offload capabilities are listed as follows:

  • Up to 2 audio output streams support
  • Up to 4 audio input streams support
  • Provides cadence for 44.1 kHz-based sample rate output
  • Support isochronous audio stream offload for LS / FS / HS USB audio device
  • Support synchronous / asynchronous / adaptive modes of isochronous audio streaming
  • Support non-PCM encoded audio bit stream defined by IEC61937 / IEC60958 standard
    • Packetizing into PCM sample format and PCM equivalent rates
  • Single audio playback (synchronous / adaptive) at 4 ch x 192 KHz x 24 bits
  • Support isochronous audio stream offload for LS / FS / HS USB audio device
  • Single audio playback (asynchronous) at 8 ch x 48 KHz x 24 bits + single audio sync input at 1 ch x 1 KHz x 32 bits
  • Up to 2 concurrent audio playback (synchronous / adaptive) at 8 ch x 96 KHz x 24 bit + 4ch x 48 KHz x 24 bit
  • Single audio capture (synchronous / asynchronous) at 4 ch x 96 KHz x 24 bits
  • Up to 2 concurrent audio capture (synchronous / asynchronous) of 8 ch x 48 KHz x 24 bit + audio sync input at 4 ch x 48 KHz x 24 bit