[wdmaudiodev] Re: USB Audio :: Support for bmaControls[1] and bmaControls[2] :: Independent channel volume control (recording)?
- From: Matthew van Eerde <Matthew.van.Eerde@xxxxxxxxxxxxx>
- To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Wed, 5 Jun 2013 23:51:29 +0000
Check KS Studio to see what the KSPROPERTY_AUDIO_VOLUMELEVEL property
descriptor says.
http://msdn.microsoft.com/en-us/library/windows/hardware/ff536380(v=vs.85).aspx
To get a Balance button, the number of channels must be > 1, and
KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_MULTICHANNEL must be set, and
KSPROPERTY_MEMBER_FLAG_BASICSUPPORT_UNIFORM must not be set.
From: wdmaudiodev-bounce@xxxxxxxxxxxxx
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of -t
Sent: Wednesday, June 5, 2013 4:29 PM
To: wdmaudiodev@xxxxxxxxxxxxx
Subject: [wdmaudiodev] Re: USB Audio :: Support for bmaControls[1] and
bmaControls[2] :: Independent channel volume control (recording)?
Hi Matthew,
That's great news!!! It made me Google "microphone properties" and scan
through the resultant images. In some of them I do find the "Balance" button
that you're referring to, but like many others - my system does not show that
balance button.
Any ideas why that balance button is missing from my system - USB Audio device
is confirmed to support stereo, and is working on MAC OS - as previously
mentioned?
Many thanks in advance,
Troy Gentry
________________________________
From: Matthew van Eerde
<Matthew.van.Eerde@xxxxxxxxxxxxx<mailto:Matthew.van.Eerde@xxxxxxxxxxxxx>>
To: "wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>"
<wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>>
Sent: Wednesday, June 5, 2013 3:12 PM
Subject: [wdmaudiodev] Re: USB Audio :: Support for bmaControls[1] and
bmaControls[2] :: Independent channel volume control (recording)?
Yes, Windows supports per-channel device volume. Sound Control Panel |
Recording devices | double-click relevant device | Levels tab
Look for a “Balance” button next to the main volume slider.
This is also exposed to apps via IAudioEndpointVolume and other APIs.
From: wdmaudiodev-bounce@xxxxxxxxxxxxx<mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx>
[mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of -t
Sent: Wednesday, June 5, 2013 2:36 PM
To: wdmaudiodev@xxxxxxxxxxxxx<mailto:wdmaudiodev@xxxxxxxxxxxxx>
Subject: [wdmaudiodev] USB Audio :: Support for bmaControls[1] and
bmaControls[2] :: Independent channel volume control (recording)?
Hi,
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
OS.
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 ->
http://msdn.microsoft.com/en-us/library/windows/hardware/ff537039(v=vs.85).aspx
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:
