[wdmaudiodev] USB Audio :: Support for bmaControls[1] and bmaControls[2] :: Independent channel volume control (recording)?

  • From: -t <tge96@xxxxxxxxx>
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Wed, 5 Jun 2013 14:35:49 -0700 (PDT)


I've added independent channel volume control support to my USB Audio 1.0 
recording device.

Under MAC OS, Audio MIDI Setup (AMS) directly supports this independent channel 
volume control of USB Audio 1.0 recording devices.  All is as expected on Mac 

However, I've been unsuccessful getting this to work under Windows 7.  Windows 
appears to send the exact same control messages with the exact same data (in 
rapid session) to master (0), left (1), and right (2) - when the master volume 
control (record) is manipulated.  Even so, if I try Audacity and split the 
stereo streams, I don't see any control messages sent as these channel volume 
controls are manipulated?

Does anyone know if Windows supports independent channel volume control (USB 
Audio 1.0 recording device)?

This page is a little thin on supported capabilities ->

Also, does anyone have another favorite page to reference when questions about 
usbaudio.sys capabilities come up?

Many thanks in advance,
Troy Gentry

Other related posts: