Re: [SoX-users] Taking the left and right channels of two wav files and joining them into one stereo file

[Erich E. <er...@ec...>]

On 06.07.2015 08:25, Chris Angelico wrote:
> On Mon, Jul 6, 2015 at 3:53 PM, fmiser <fm...@gm...> wrote:
>>>> keghn wrote:
>>>>
>>>> sox infile.wav outfile_left.wav remix 1
>>>> sox infile.wav outfile_right.wav remix 2
>>
>>> Erich wrote:
>>>
>>> RT wants it the other way round. What he's looking for
>>> isn't called merge "effect", but merge "combining
>>> method" (-M):
>>>
>>> sox -M in_left.wav in_right.wav out_stereo.mp3
>>
>> Except the input files are stereo.  And he wants the output
>> channel 1 from channel 1 from one input file and output
>> channel 2 from channel 2 from  the other input file.

ok, then I misinterpreted "take left and right channel of two wav files".

>>
>> Two stereo files merged will create a four channel file which
>> 'remix' can then take two of those channels to create the new
>> two channel (stereo) output file.
> 
> Or alternatively, fold the two input files down to mono, and then
> merge into one output file. But I'm curious: Can this be done with a
> single sox invocation? There are times when I'd like to do this too.
> 
> ChrisA

yes and afaik no:

yes, if you count the number of commands you have to type into your
command line:
sox -M "|sox in_left.wav -p remix 1" "|sox in_right.wav -p remix 2"
out_stereo.mp3

and no, if you count the number of sox-processes actually running (the
above command will have 3, I can't think of one with less processes,
which _first_ mixes down and then merges together).

greetings,
Erich