[pulseaudio-discuss] Source->Sink Routing

Justin Tulloss jmtulloss at gmail.com
Wed Jul 11 17:07:15 PDT 2007

Hey Lennart,

I don't mean to rush, I really appreciate what you've done so far. I think
we're sunk into this system now with a stable module API or not, so for
better or worse, I'm going to have to develop this stuff.

If I'm just going from 1 source to 1 sink, do I need to worry about
deviating crystals? Won't they just read and write data at the pace that
makes them happy, with the remainder sitting in a buffer?

In any event, in my system our clocks shouldn't be too much of a problem, so
I think I can hack something together. I guess we'll have to see.


On 7/11/07, Lennart Poettering <lennart at poettering.net> wrote:
> On Tue, 10.07.07 19:05, Justin Tulloss (jmtulloss at gmail.com) wrote:
> Hi!
> > Is there a good way of routing a source output straight to a sink? For
> > instance, if I wanted the output of my microphone to be routed straight
> to
> > my speakers, how would I go about doing that in pulse?
> >
> > If there's not a way that exists now, could I easily write a module to
> do
> > so?
> This has been on my todo list for quite a while and has already been
> requested multiple times.
> This stuff is not trivial, because sound card crystals usually deviate
> and thus the stream data needs continuous adaptive resampling. We
> already have something similar in module-combine, but due to the
> current changes in our core its not worth it to port to over just yet.
> To guarantee optimal latency this should be done as a module for the
> PA daemon.
> Please be patient!
> Lennart
> --
> Lennart Poettering                        Red Hat, Inc.
> lennart [at] poettering [dot] net         ICQ# 11060553
> http://0pointer.net/lennart/           GnuPG 0x1A015CC4
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