Re: f13 pulse and passthrough

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On Tue, Oct 12, 2010 at 10:09:55PM +0100, Ian Malone wrote:
> On 12 October 2010 16:02, Paul W. Frields <stickster@xxxxxxxxx> wrote:
> >
> > On Mon, Oct 11, 2010 at 11:16:37PM +0100, Ian Malone wrote:
> >> Hi,
> >>
> >> I've had a look and the only thing I can find on this is an unresolved
> >> bug report. Which is odd, because prior to pulse every sound system I
> >> ever used let you play the sound in directly to sound out. Anyway the
> >> situation is this: I'd like to be able to play a guitar through my
> >> sound card and be able to listen to backing tracks and other things at
> >> the same time. The suggested "pacmd load-module module-loopback" isn't
> >> viable as it has latency. JackD works fine for guitar (and I can use
> >> things like rakarrack or guitarix which are good fun), but using JACK
> >> seems to mean I can't use other sound sources (presumably it connects
> >> to ALSA). So, what's the answer?
> >
> > In PulseAudio, each sink has an associated "monitor" source that you
> > can use to monitor what's going out of that sink (such as listening to
> > a mixdown).
> >
> 
> How do you actually listen to a monitor? The only way I've found so
> far is to use the loopback device which has a ~ 1/3 second latency.

You can do this by running 'pamon' (from the pulseaudio-utils package)
and assigning the stream you create to some sink.  I just did it both
by 'folding back' onto the same output device and by assigning to a
new device.  In both cases latency was not apparent -- when I folded
back it sounded just like I increased the gain of the input stream.

-- 
Paul W. Frields                                http://paul.frields.org/
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