[wdmaudiodev] Re: usbaudio w. MIDI on XP ??
- From: "Thomas Zepf" <thzepf@xxxxxxxxxxx>
- To: <wdmaudiodev@xxxxxxxxxxxxx>
- Date: Thu, 24 Oct 2002 09:31:48 +0200
A small update:
meanwhile I also checked this behavour also with a Midi
USB kyeboard which has no audio class descriptors.
Results are the same after replug there is no usbdevice
for about 5 min when bulk transfer has been started before.
Also SP1 for XP does not change anything.
BTW:
If a am doing the same thest under ME all is fine.
So the question will be:
is there a way to work arround this issue from the device side ?
Cheers Thomas
----- Original Message -----
From: Thomas Zepf <thzepf@xxxxxxxxxxx>
To: <wdmaudiodev@xxxxxxxxxxxxx>
Sent: Tuesday, October 22, 2002 10:22 AM
Subject: [wdmaudiodev] usbaudio w. MIDI on XP ??
>
> I am designing a new USB audio device which contains both
> MIDI and audio functions. So far both parts are working.
>
> The problem comes when XP sees a Unplup Event and
> there was a midi app opened before. (MIDIOx).
>
> Then the device is not enumerated for about 5 min !
> This does not occur if I don't use any MIDI app prior
> unpluging.
>
> My device uses 4 interfaces:
> - Interface 0 for Audio Class Controls
> - Interface 1 for Audio Stream Out
> - Interface 2 for Audio Stream In
> - Interface 3 for Midi
>
> The midi part uses the example descriptors from the
> Midi spec. with a second AC Header.
> Midi and Audio Part are using different jack-ids.
>
> Cheers Thomas
>
>
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