[alsa-devel] [PATCH v3 5/5] ALSA: snd-usb: add quirks handler for DSD streams

[Jesus R]

On Mon, Aug 12, 2013 at 7:52 AM, Daniel Mack <zonque at gmail.com> wrote:

> On 12.08.2013 13:27, Jesus R wrote:
> > On Mon, Aug 12, 2013 at 4:52 AM, Daniel Mack <zonque at gmail.com
> > <mailto:zonque at gmail.com>> wrote:
>
> > Right now MPD supports DSD/DoP with one selectable on/off option. On
> > equals DoP output and off equals conversion to PCM. I'm not aware of any
> > case where it does not work. I would seem to me that there is one
> > predominant format?
>
> Let me clarify that again: I read the above as the two options are
>
> a) DSD material is augmented by DOP markers and send as such over a
> regular PCM interface, or
>
> b) convert DSD to PCM in software and then send PCM samples over a
> regular PCM interface.
>
>
> What applications need to use for my new approach is another is:
>
> c) take DSD samples, bit reverse them if necessary, and then send them
> over the generic DSD data pipe to the Linux kernel. Device-specific
> details are taken care of by the kernel layer.
>
Yes, I understood this. I'm not sure what MPD will do going forward though.
The end goal should be DoP as needed and native DSD if supported.

>
>
> I'm not aware of any software that uses that new DSD format type
> directly except for my example program.
>
Jussi might be using it:) I'm going to propose it to a project I'm involved
in..

>
>
> Daniel
>
>