Re: Question about syntax for --sox−pipe with output to file

[Eric Wong <normalperson@yhbt.net>]

Pierow <pierow@thepyro.com> wrote:
> I am using -p to pipe a series of three SoX commands that generate three tones:
> 
> play "|sox -n -p synth .276 sine 1200 gain -1" "|sox -n -p synth .276
> sine 900 gain -1" "|sox -n -p synth .380 sine 1200 gain -1"
> 
> I would like to output the resulting three tones to a WAV file.  I'm
> sure that this is something that is easy to do but nothing that I have
> tried seems to work.  I have read the man page and searched through
> the archives of the mailing list but I can't seem to find anything
> that works with the piped commands.

See the short SYNOPSIS at the top of the manpage,
many people probably skip over it :)

> Is there a way to tell direct this output to a file instead of playing
> to system audio?

Same as play, almost:

sox "|sox -n -p synth .276 sine 1200 gain -1" \
	"|sox -n -p synth .276 sine 900 gain -1" \
	"|sox -n -p synth .380 sine 1200 gain -1" \
	output.wav

Basically, "play $INPUTS" is the same as "sox $INPUTS -t $FORMAT"

So if you use alsa, the following should behave just like play
did for you:

sox "|sox -n -p synth .276 sine 1200 gain -1" \
	"|sox -n -p synth .276 sine 900 gain -1" \
	"|sox -n -p synth .380 sine 1200 gain -1" \
	-t alsa

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