On Mon, Mar 05, 2018 at 10:39:19AM +0100, Rodolfo Medina wrote: > Hi all. > > 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. Hope this helps, > I hope I was clear enough... > Thanks for any help. > > Rodolfo > -- Joel Roth