On Wednesday, March 07, 2018 04:06:12 AM Rodolfo Medina wrote: > 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/behrin > ger-umc404hd.html?gclid=Cj0KCQiAuP7UBRDiARIsAFpxiRKgsptPW1qxkEw793ahs684ltl > hyh5dcIgzLJXtDh39CZA8IEX3qgIaAnquEALw_wcB
Well, I'm not Joel, and I didn't read the description of that device thoroughly (actually I google for it and then read a little bit about it in English on Amazon), but I don't think that's what I had in mind when I suggested something like 1 5.2 or 7.2 (or should that be 5.1 or 7.1) soundcard. The Amazon page I looked at: https://www.amazon.com/s/?ie=UTF8&keywords=behringer+umc404hd&tag=googhydr-20&index=aps&hvadid=178390564539&hvpos=1t2&hvnetw=g&hvrand=939372652501756766&hvpone=&hvptwo=&hvqmt=e&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9006968&hvtargid=kwd-113850346562&ref=pd_sl_18vyq1e9hy_e Starting with the obvious, it's not a sound card (it is a separate standalone device which can presumably be hooked to a computer, but I think the computer would still require a sound card in addition to this device, because) it is not clear to me that your computer can use this device to deliver 5 (or 7, or 4) separate "channels" of sound to it. So, I wouild read carefully and hope for some more input from Joel.