Hello everyone, We have an USB Audio device which supports only 8-bit 8Khz Mulaw. Though microsoft documentation says USBAudio driver supports mulaw, it doesn't work properly (confirmed by microsoft). Now for work around we plan to do the following. Modify the device so that it comes up as 16 bit PCM but it will send mulaw data. I want to develop/insert a Minidriver so that it can convert the 16 PCM to Mulaw and vice-versa. So that all applications can use it as if it is a 16 bit PCM device. I would like to know what kind of minidriver to develop for e.g. AVStream minidriver or something else. I would also like to know the complexity of such a minidriver. Any suggestion is welcome. Thanks, Harish ****************** 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/