Re: usbaudio won't do 24-bit or 32-bit i/o, and won't do 96000 frames per second

[Takashi Iwai <tiwai@suse.de>]

Hi Patrick,

At Fri, 06 Dec 2002 15:48:14 +0900,
Patrick Shirkey wrote:
> 
> Clemens Ladisch wrote:
> > John S. Denker wrote:
> > 
> >>Request #1: USB driver supporting 24-bit i/o.
> >>Request #2: USB driver supporting 96000 frames per second.
> > 
> > 
> > What you want is already supported by the snd-usb-audio driver. IIRC
> > Patrick Shirkey reported that 24bit@96kHz works with the M-Audio Quattro.
> > 
> 
> Actually I have just yesterday noticed a specific problem with the 24 
> bit support.
> 
> Also you should know that the quattro only supports 24_3le which is 24 
> bits, three bytes. This is contrary to possibly all other pro devices 
> which support 24bits, four bytes or something like that. Meaning that 
> you have to use a special bit depth just for the quattro. This could be 
> the problem you are seeing.
> 
> Currently I am using the cvs from the 18 November. I will update and 
> check again. I have initialised both pcms and I cannot record a signal 
> through the first pcm hw:1,0 although arecord doesn't complain.

could you tell me the rcs version numbers of the files on
alsa-kernel/usb you are using (18 Nov.) ?  i've checked the files via
cvs but i couldn't see any differences around the date.


Takashi


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