On Mon, 5 Mar 2018, at 16:14, Rodolfo Medina wrote: > Let's then have a two-channels audio file, let's call it input.wav. Sox > should > be told to send channel 1 of input.wav to soundcard 1 and channel 2 of > input.wav to soundcard 2. Having a look at sox manual, I didn't find anything > such...
I did say earlier: > >> Maybe 'sox' can direct audio to multiple channels, but I think you > >> will need to tell sox which hardware devices to use. The section > >> of the sox manual, page 3, "Playing & Recording Audio" might help. You'll need to adapt the definition of the output device to whatever your hardware requires. That is, I expect that setting AUDIODEV will be the answer, but I can't say HOW you would set it. You'd need to look at the manual for your specific hardware, I think. -- Jeremy Nicoll - my opinions are my own.
