Re: [SoX-users] backgrounding

[<pj...@pj...>]

Jan Stary wrote:
> >   ~> play -q backing.wav &
> > doesn't run in the background, it enters Stopped state :-(
> 
> Show us the output of ps(1) that proves this.

~> play -q backing.wav &
[1] 1586
~> # complete silence :-(
~> jobs
[1]+  Stopped                 play -q backing.wav
~> ps -p 1586
  PID TTY          TIME CMD
 1586 pts/6    00:00:00 play

> >   ~> (play --buffer 1024 -q backing.wav &) \
> >   >  & sox -t alsa mt:4,0 solo.wav
> >   it must add something to the latency. )
> 
> This is _not_ the way to do synced recordings.
> The backing and the solo will be shifted by a latency.

Glad to hear it. I was extrapolating from help posted by Rob
26jul2009, where he also notes:

> However, two things to be aware of:
> 1. latencies may cause a delay between original and new channels
>  -- this can fixed afterwards using the delay effect.
> 2. the above works with SoX 14.2.0, but not with 14.3.0
>  -- looks like a fix is needed.

I would be pleased to hear of the right way to do synced recordings.
I didn't see any mention of "sync" or "overdub" in the manual pages.

Pascal writes:
> FWIW, `play -q backing.wav &` works as expected here i.e. it does play.

Hmm... OK, I'm using up-to-date debian squeeze:
~> bash --version
GNU bash, version 4.1.5(1)-release (i486-pc-linux-gnu)
~> sox --version
sox: SoX v14.3.0

Regards,  Peter Billam

http://www.pjb.com.au       pj...@pj...      (03) 6278 9410
"Was der Meister nicht kann,   vermöcht es der Knabe, hätt er
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