Joel Roth <jo...@pobox.com> writes: > On Mon, Mar 05, 2018 at 10:39:19AM +0100, Rodolfo Medina wrote: >> After learning, some months ago, thanks to listers' help, how to live record >> into a multi channel audio file, I was wondering about the reverse problem: >> now I have my multi channel audio file, e.g. composed by three different >> channels. Is it possibile (I guess it is), and how?, to send each of the >> three outputs into a different loud speaker and so listen to the song...? >> > > Hi Rodolfo, > > Ecasound is pretty convenient for routing audio. > > If you connect three powered speakers to the first three > channels of a (sufficiently capable) soundcard and you're > using ALSA (the default low-level linux audio API), it's > pretty simple: > > For example, > > ecasound -i:3ch.wav -f:16,3,44100 -o:alsa,default > > If you need to fool around with the routing, you can do > almost anything. For example, assuming you have an > 8-channel soundcard and want to route ch1 to ch5, ch2 to ch6 > and ch3 to ch7: > > ecasound -i:3ch.wav \ > -f:16,8,44100 \ > -chmove:1,5 \ > -chmove:2,6 \ > -chmove:3,7 \ > -o:alsa,default > > Maybe you need to add separate effects (e.g. volume control) to each channel: > > ecasound \ > -a:in -i:3ch.wav -o:loop,3ch \ > -a:ch1,ch2,ch3 -i:loop,3ch \ > -a:ch1 -chmove:1,5 -ea:80 \ > -a:ch2 -chmove:2,6 -ea:70 \ > -a:ch3 -chmove:3,7 -ea:60 \ > -a:ch1,ch2,ch3 -f:16,8,44100 -o:alsa,default > > There's a lot more you can do with ecasound, and there are > various front ends that provide a higher level of > abstraction.
Fantastic... thanks, Joel. I want to buy one of those multichannel soundcards... Do you think this one could be all right...? https://www.strumentimusicali.net/product_info.php/products_id/51790/behringer-umc404hd.html?gclid=Cj0KCQiAuP7UBRDiARIsAFpxiRKgsptPW1qxkEw793ahs684ltlhyh5dcIgzLJXtDh39CZA8IEX3qgIaAnquEALw_wcB Rodolfo
