Re: Merge and pipe channel assignment madness

Bouke / VideoToolShed <[email protected]> Thu, 7 Sep 2017 20:43:48 +0200
Newsgroups	gmane.comp.audio.sox
Message-ID	<[email protected]>
> On 07 Sep 2017, at 17:51, Jan Stary <[email protected]> wrote:
> 
>>>> Trying to merge multiple mono and poly Wave files while piping (to add custom padding to each input file.)
>>>> Whatever I do, on input poly files the output channel order is totally unpredictable.
>>>> 
>>>> I’m using something like sox -M “| sox 3ch.wav -p pad 1” “|sox 5ch.wav” -b 24 output.wav
>>>> I would expect to get the same order of output as in the order of the input / pipe, but that does not happen.
>>> 
>>> I cannot reproduce this behaviour.
>>> 
>>> What version of SoX are you using?
>>> Does it also happen with the current version
> 
>> https://we.tl/4XNMXikv0J
>> Y:\sox-14-4-2\sox -M "| Y:\sox-14-4-2\sox J:\Torsten\tst\T72.WAV -p pad 0" "| Y:\sox-14-4-2\sox J:\Torsten\tst\T72.WAV -p pad 1" -b 24 J:\Torsten\tst\output.wav
>> 
>> The file has ch1 (a bit) static, ch2 silence, ch3 voice
>> On merge, the input tracks are reversed (but other files behave random.)
> 
> With my installation of SoX, running
> 
> 	$ sox -M "|sox T72.WAV -p pad 0" "|sox T72.WAV -p pad 1" output.wav
> 
> creates an output file with 6 channels, containing (in this order):
> 
> 	1 static
> 	2 silence
> 	3 voice
> 	4 static
> 	5 silence
> 	6 voice

Hi Jan,
Yeah, that’s what I would expect :-)

> so I still cannot reproduce your problem.
> I also tried with the "-b 24" which should be irrelevant - no change.
> 
> Can you please also upload your output file?

Sure, here you go:
Download link
https://we.tl/lRpO2tMTxu <https://we.tl/lRpO2tMTxu>

I must say, I’ve only checked in Audacity, but I doubt that would matter...
Btw, I’ve only tested on Windows (7, but I doubt that will matter….)
Bouke

> 	Jan
> 
> 
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