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

Lennart Poettering lennart at poettering.net
Mon Oct 5 18:57:15 PDT 2009

On Tue, 06.10.09 10:40, Dave Moore (davewantsmoore at gmail.com) wrote:

> 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?)

Just make sure PA doesn't grab the device, and then tell your app to
use the low-level spdif-pass-thru directly. How that is configured has
nothing to do with PA, and in fact stays exactly the same whether you
run PA or not.


Lennart Poettering                        Red Hat, Inc.
lennart [at] poettering [dot] net
http://0pointer.net/lennart/           GnuPG 0x1A015CC4

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