Hi, All! I have written audio installable driver and very specific "hardware" audio driver. I want to use my installable driver instead of wdmaud.drv, but OS Windows (2000+SP4, XP+SP2) not uses my driver! What specific requirements exist for audio installable drivers? This is my inf file: -----<BEGIN [Version] Signature="$CHICAGO$" Class=MEDIA ClassGUID={4d36e96c-e325-11ce-bfc1-08002be10318} Provider=%Provider% DriverVer=9/18/2009,1.0.0.0 [DestinationDirs] mysys.CopyList = 10,system32\drivers mydrv.CopyList = 10,system32 [SourceDisksNames] 1 = %DiskId1% [SourceDisksFiles] my_aud.sys = 1 my_drv.drv = 1 [Manufacturer] %MfgName% = models [models] %DeviceDesc%=mydevice, USB\VID_XXXX&PID_XXXX&MI_XX [mydevice] CopyFiles=mysys.CopyList, mydrv.CopyList AddReg = mydevice.AddReg [mydevice.Services] Addservice = my_aud, 0x00000002, my_Service [my_Service] DisplayName = %MY_SDesc% ServiceType = 1 StartType = 3 ErrorControl = 1 ServiceBinary = %10%\system32\drivers\my_aud.sys LoadOrderGroup = Extended Base [mysys.CopyList] my_aud.sys [mydrv.CopyList] my_drv.drv [mydevice.AddReg] HKR,Drivers,SubClasses,,"wave,mixer" HKR,Drivers\wave\my_drv.drv,Driver,,my_drv.drv HKR,Drivers\wave\my_drv.drv,Description,,%DeviceDesc% HKR,Drivers\mixer\my_drv.drv,Driver,,my_drv.drv HKR,Drivers\mixer\my_drv.drv,Description,,%DeviceDesc% [Strings] ... ----->END My "hardware" driver installs and works through DeviceIoControl well. However, Windows not sees my installable driver, and I can't to use waveAPI! -- Igor Galchuk <ingvio@xxxxxxxxxxx> ****************** 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/