[wdmaudiodev] Re: setting sample rate in the control panel in Vista
- From: Eugene Gavrilov <egavrilov@xxxxxxxxxxxxx>
- To: Hakon Strande <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 1 Nov 2007 19:09:15 +0300
Hakon,
> If the device is disconnected and reconnected it is not expected that
> the system retains the sample rate setting for this device especially if
> the device now on re-connect exposes different format support that does
> not contain the original format supported on the first connect.
Yes, I guess so. However, this happens with our driver. Do you need
any additional information? I guess the issue can be related to the
data format used by our driver: 24-bit audio in 32-bit containers.
(Bits per sample: 32; Valid bits per sample: 24)
> If this is a USB Audio device can you try connecting it to ANOTHER USB
> port (that the device has never been connected to before) and report the
> behavior?
The same thing happens. I connect the device, install the driver.
Check audio playback. There's single option in the Windows control
panel (24 bit + sample rate + 'Studio quality'). Selection is disabled.
I disconnect the device. Change sample rate. Re-connect the
device. Our custom control panel shows new sample rate (retrieved
directly from the device), driver KS topology only manifests single data
range with the new sample rate, Windows control panel still displays old
format and allows to choose between old and new. 'Studio quality'
is only shown near the new sample rate.
When the control panel is opened, the driver gets a
lot of Intersection requests with all sample rates, 8, 16, 24 bit
depths, but no 32 bits. If I try to playback audio, the driver gets a
lot of requests to create KS Pin with old format (wrong sample rate),
these requests fail. If I change the format, close and re-open the
control panel, it displays single format (correct one), selection is
disabled, audio playback is OK.
Regards,
Eugene Gavrilov
Senior Software Engineer,
CEntrance, Inc.
******************
WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe: mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator: mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx
URL to WDMAUDIODEV page:
http://www.wdmaudiodev.com/
Other related posts:
