FreeLists / wdmaudiodev / [wdmaudiodev] Re: USB and ADPCM data format

["Raphael Lamy " <raphael.lamy@xxxxxxx>]

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