On Tue, Apr 09, 2013 at 15:25:15 -0700, chris hermansen wrote:
> Torstein, list;
>
> On Tue, Apr 9, 2013 at 12:34 AM, Torstein Hegge <[email protected]> wrote:
> > On Mon, Apr 08, 2013 at 18:28:30 -0700, chris hermansen wrote:
> [..]
> >> Hmm that was a bit of a slip of the brain. Anyway, I'm actually back
> >> in the same general vicinity as the Bifrost and can do some more
> >> testing.
> >>
> >> Torstein, is there anything specific you want me to try, or just patch
> >> up the kernel and have at it?
> >
> > The latest iteration of the patch is included in the 3.9-rc6 kernel. You
> > can try a plain 3.9-rc6 kernel without any modifications.
>
> So, I've updated my aging Toshiba "test bed" to the latest Ubuntu
> 13.04 release and grabbed the 3.9-rc6 kernel from
> http://kernel.ubuntu.com for testing.
>
> Trying out a bunch of songs with no noise, that's great news! But now
> something else seems weird.
>
> When I play a 96/24 file through plughw corresponding to the Schiit, I see
> this:
>
> [...]
>
> Ie the 24bit data is getting downsampled to 16 bits!
>
> It also seems like "stream0" for the Schiit only plays back 16bit data
>
> cat stream0
> CMEDIA Schiit USB Interface at usb-0000:00:13.2-3, high speed : USB Audio
>
> Playback:
> Status: Stop
> Interface 1
> Altset 1
> Format: S16_LE
> Channels: 2
> Endpoint: 5 OUT (ASYNC)
> Rates: 44100, 48000, 88200, 96000, 192000
> Data packet interval: 125 us
>
> [...]
>
> Also this stream0 looks markedly different than the version I
> displayed back on 3 March.
It looks like the Interface 1, Altset 2 is missing, with the 3.8.0
kernel you had another Altset,
Interface 1
Altset 2
Format: S32_LE
Channels: 2
Endpoint: 5 OUT (ASYNC)
Rates: 44100, 48000, 88200, 96000, 192000
Data packet interval: 125 us
What does dmesg / /var/log/kern.log say when you plug in the device with
the v3.9-rc6 kernel?
Torstein
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