UAC2.0 - How to work when sound card is IN&OUT at the same time RRS feed

  • Question

  • How to modify the descriptor and let IN/OUT work at the same time?
    This Driver can only work in the OUT+Feedback endpoint(explicit).
    When modify the descriptor is OUT+IN(implicit), it cannot work.
    When modify the descriptor is OUT+Feedback endpoint+IN, it can work, but no IN transaction of Feedback endpoint. So asynchronous incorrect.
    • Edited by Alex_Tsai Thursday, October 25, 2018 12:54 AM
    Thursday, October 25, 2018 12:53 AM

All replies

  • I'm not sure I understand your situation.  You describe your device's topology with the Audio Control descriptors.  You can have a physical microphone that feeds into a "streaming out" function that maps to Audio Streaming IN endpoint, and you can have a "streaming in" function mapping to an Audio Streaming OUT endpoint that fedes into a physical speaker, but each Audio Streaming interface goes in one direction only.

    Tim Roberts | Driver MVP Emeritus | Providenza & Boekelheide, Inc.

    Thursday, October 25, 2018 9:15 PM
  • Read this describe page again in detail

    For the asynchronous OUT case the driver supports explicit feedback only. 
    The driver does not support implicit feedback.

    Microsoft behind for many yesrs......

    Tuesday, November 20, 2018 4:28 AM