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 ****************** 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.de/