Hello, In the Audio USB specification, I don't find the way to inform windows to use the ADPCM format ? I have only the MPEG, AC3, muLaw, Alaw, PCM ... but not ADPCM ? Could you help me ? Thanks in advance Raph C2me s.a. -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of DJ Sisolak Sent: mardi 23 mars 2004 19:13 To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: USB and ADPCM data format Hello Raph, 2 or 3 bytes a cycle should still work. Again, without the benefit of testing, one can never be sure. DJ Sisolak Microsoft Corp. This posting is provided "AS IS" with no warranties, and confers no rights. _____ From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Raphael Lamy Sent: Tuesday, March 23, 2004 1:14 AM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: USB and ADPCM data format Dear All, My bandwidth is limited and I would like to use a ADPCM operating at 24Kbits/s or maybe 16Kbits/s. Can I use one from these one with USBAudio.sys ? Thanks In advance Raph -----Original Message----- From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of DJ Sisolak Sent: lundi 22 mars 2004 18:38 To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] Re: USB and ADPCM data format Hello Raph, The short answer to your question is yes, the ADPCM format is supported in USBAudio.sys though we have not had any devices to thoroughly test it with. Thanks, DJ Sisolak Microsoft Corp. This posting is provided "AS IS" with no warranties, and confers no rights. _____ From: wdmaudiodev-bounce@xxxxxxxxxxxxx [mailto:wdmaudiodev-bounce@xxxxxxxxxxxxx] On Behalf Of Raphael Lamy Sent: Monday, March 22, 2004 8:49 AM To: wdmaudiodev@xxxxxxxxxxxxx Subject: [wdmaudiodev] USB and ADPCM data format Dear All, I develop a USB audio device and I need to use a ADPCM data format. I just need to know if it is possible to use this format without to write a custom driver (maybe just using usbaudio.sys and Ks.sys). Which are the real datas to send from the USB chip to windows ? Thanks in advance Raph