[pulseaudio-discuss] "passthrough" audio (eg. AC3 / DTS / WM9)

Dave Moore davewantsmoore at gmail.com
Mon Oct 5 16:40:59 PDT 2009

Wow.  Thanks for the replies everyone.  I didn't know what to expect.

I completely understand why PA doesn't work (well?!) with pass-through....
so my question is now.

If I am to keep PA installed and configured (it's now part of my Linux
distro and would like to keep things as "vanilla" as possible)..... what
steps can I take to have PA pass unaltered data through to my digital out ?

(I understand I will not have sound mixing, or multiple applications able to
use the card at once ->  basically I would lose all the benefits of PA.....
but in order to stick with what my distro offers, but also to get what I
need (encoded formats passed unaltered to digital out)..... what can I do?)

Many thanks.

2009/10/6 Lennart Poettering <lennart at poettering.net>

> On Mon, 05.10.09 14:30, Dave Moore (davewantsmoore at gmail.com) wrote:
> > Hi Everyone.  I'm really sorry if this has been covered before, I've read
> > back through the past 6 months list history and found nothing.... and my
> OS
> > (ubuntu) and application support forums/lists are not being very helpful.
> >
> > I would like to pass digital audio completely unaltered ("bit-stream") to
> my
> > SPDIF output - Can this be done with pulseaudio?
> No. Not at this time. (See other mails in this thread for what is planned)
> If you need ac3 pass-thru then you need to bypass PA. Just make sure
> you are not using the SPDIF port for PA (use g-v-c or pavucontrol and
> make sure the sound card is notconfigured for any of the 'digital
> iec985' modes).
> Lennart
> --
> Lennart Poettering                        Red Hat, Inc.
> lennart [at] poettering [dot] net
> http://0pointer.net/lennart/           GnuPG 0x1A015CC4
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