[LAD] audio recording through pipe using mplayer and sox sometimes has incorrect speed

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Sat Apr 18 09:28:23 UTC 2009


On Thu, 2009-04-09 at 14:34 -0400, Paul Davis wrote:
> On Thu, Apr 9, 2009 at 2:28 PM, Justin Smith <noisesmith at gmail.com> wrote:
> Off the top of my head, something could be put together with a shell
> > script using the jack_connect program. If you are OK with a single
> > purpose script that runs and connects two specific known programs,
> > this will be easy, making it work with arbitrary programs provided as
> > arguments is better done with something like lash, or patch-bay
> > persistence.
> 
> to be more specific:
> 
> 
> ----------------------
> #!/bin/sh
> 
> jackd ... jack arguments here ... &
> sleep 2
> clientNumberOne &
> sleep 2

It'd be nice to have a utility in jack that would work like this:

jack_waitForClient clientNumberOneName

or something similar... returns when the named port is available
(hopefully signalling that the application is ready, at least from the
point of view of jack connections)

-- Fernando


> client NumberThree &
> sleep 2
> 
> jack_connect system:playback_1 clientNumberOne:in_1
> jack_connect system:playback_2 clientNumberOne:in_1
> jack_connect system:playback_1 clientNumberTwo:in_1
> jack_connect system:playback_2 clientNumberTwo:in_2
> 
> ----------------------
> 
> signal handling to shut down jackd and the two clients is left as an
> exercise for the interested.
> 
> --p
> 
> 
> 
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