Re: Schiit Bifrost, usb, C-Media 6631

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Thank you Clemens.

I will try the same dac on my fedora 16 laptop which is in the 3 series.

I really appreciate your quick response, at first I was quite surprised that it wasn't working but it makes sense now!

On Thu, Nov 3, 2011 at 4:15 AM, Clemens Ladisch <cladisch@xxxxxxxxxxxxxx> wrote:
Andrew Dunn wrote:
> The Schiit Bifrost uses a C-Media 6631,

This is a USB Audio 2.0 chip.

(The USB Audio specification is separate from the USB specification, and
almost all USB audio devices still use the 1.0 audio spec because that
is what Windows supports.  However, this chip is beginning to show up
in many newer devices, so we are very interested in making sure that
this chip is supported completely.)

> I'm using this with ubuntu 10.04:
>
> $ uname -r
> 2.6.32-34-generic-pae

The first USB Audio 2.0 support was added in kernel 2.6.35; you need
at least Ubuntu 10.10 (and a newer one wouldn't hurt).

> Here is a gist of an lsusb -v: https://gist.github.com/1335351

That old lsusb doesn't know about audio 2.0 descriptors either.


Regards,
Clemens



--
Andrew Dunn
248.238.8649
http://agdunn.net

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