Hi, I've developed a usb audio class device, it's a microphone. An IT, a feature unit and an OT, it works fine in Windows XP, i mean i can record audio in the Sound Recorder. The detail is, that i can't find to make windows detect the feature unit, because when y select my device in Control Pane-> Sound the Volume button is disabled. I've have programmed the device to answer to GET and SET CUR, MAX, MIN and RES and tested them with Jungo's WinDriver Wizard. So, wich could be the issue? Another thing is that when i plug my device, and the balloon pops up, it says: "Microphone" (My product name) then USB Composite Device (As it's get registered in the Device manager list under USB controllers, then it detect the "Interface 0" and then USB Class Audio. So far it's nice, but why does the interface get listed in the Device Manager under Sound, video and game controller as "USB Class Audio" rather than "Interface 0". Notice that in Control Pane-> Sound in the dropdown box i have "Interface 0" as the device name. Thanks a lot Afro. ****************** 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/