rhkra...@gmail.com writes: > On Monday, March 05, 2018 05:49:45 AM Jeremy Nicoll wrote: >> On Mon, 5 Mar 2018, at 09:39, Rodolfo Medina wrote: >> Does your computer, or attached soundcard(s) have capacity to >> drive three outputs at once? >> >> If it does I think you'll need to tell whatever software controls that >> hardware where to take audio-data from. >> >> 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. > > Without having ever (intentionally) used jack (JACK (Jack Audio Connection > Kit)), I would guess that it might be useful. > > (Like Jeremy says, you will need 3 output devices.) Somewhere along the line > I bought some audio devices (my choice of words) that are, afaik, like a > sound card built into a very small (USB) plug like device. I can plug it > into a USB and then plug stereo headphones into it--the device functions like > a sound card, self powered from the USB port. > > I bought those, as I often do such things, off ebay from the far East. > > I suppose you might do a hinky workaround to get two output devices from one > (stereo) sound card by (possibly after merging stereo signals into a mono > signal) sending a different (mono) signal to each channel (i.e., left and > right) of a stereo sound card, at least for a sort of feasibility test. > > Do they make 5.2 or 7.2 sound cards for computers--if so, you could consider > a similar approach using those 5 (or 7) channels.
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... Rodolfo
