[LAU] status usb2 for sound

[Giso Grimm]

Hi,

however, there is at least one (not really commercially available) sound
card which utilizes the USB2 bandwidth, but being conform to the Linux
USB sound driver without any modification. This is a custom made deivce
for use with hearing aid shells, see

http://lad.linuxaudio.org/events/2009_cdm/Friday/07_Grimm/07.pdf

for a description. In its full configuration it provides six input
channels and two outputs, at 24bit/96kHz, resulting in 13500 kBit/s
capture bandwidth, and 4500 kBit/s playback bandwidth. At least the
input bit rate is above the USB 1.1 specification.

Not to useful information, just a proof that it is possible to have USB2
sound devices which are Linux snd_usb compatible.

Giso

Paul Davis wrote:
> On Thu, Nov 5, 2009 at 4:06 AM, Hartmut Noack <zettberlin at linuxuse.de> wrote:
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>> Hello,
>>
>> USB1 works OK with ALSA but what is the status for USB*2*-Soundcards?
>>
>> I cannot find any useful info on http://www.alsa-project.org/ . So what
>> are you experiences? Anybody out there working on drivers for stuff like
>> this:
>>
>> http://de.m-audio.com/products/de_de/FastTrackUltra.html
>>
>> ..that is not class-compliant?? Or is it working already for anybody out
>> there?
> 
> i believe that clemens has stated previously:
> 
>    * there is no class driver for audio on USB2 for linux
>    * almost all USB2 audio interfaces are not class compliant
> 
> something like that. chicken, meet egg.
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