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2 soundcards to record 4 tracks. [SOLVED]

Posted: Wed Nov 07, 2012 1:00 pm
by English Guy
Hi

I have some old 4 track cassette work I would love to remix & remaster. the problem is I neither have nor can afford a 4 track interface. I have an Alesis io2usb soundcard as well as a 24 bit capable soundblaster.

I have Googled but not found anything I can comprehend or use. Is there any way using alsa, jack, oss or even pulse I can simply record from all 4 tracks simultaneously using 2 inputs per card. It only has to be capable of the transfer. After that, of course, the resultant file can be used in the normal way.

thanks
Guy

Re: 2 soundcards to record 4 tracks.

Posted: Wed Nov 07, 2012 5:28 pm
by English Guy
Since asking managed to find this:

http://forum.audacityteam.org/viewtopic ... 27&t=56492

now have 4 inputs showing in qjackctl after running

Code: Select all

alsa_in -j on-board -d hw:0 -c 2 -p 4 -n 512 -r 48000
in a terminal. Have yet to be able to try it out with the 4 track.

Re: 2 soundcards to record 4 tracks.

Posted: Wed Nov 07, 2012 6:23 pm
by English Guy
Just managed to use this to record four simultaneous tracks in Ardour (Stereo drum machine, guitar Vocals)

The only other thing I needed to do was connect the on board soundcard to the system playback using qjackctl to get monitor (through the usb soundcard) while playing.

Re: 2 soundcards to record 4 tracks. [SOLVED]

Posted: Wed Nov 07, 2012 10:45 pm
by varpa
I'm not quite sure I understand your set up - you are using your regular soundcard for line in for 2 tracks and the other 2 tracks with the Alesis + alsa_in? If I were you I would think about recording 2 tracks at a time using your Alesis only with a regular Jack connection. That, is record in 2 passes, 2 tracks each time, though outputting into 4 tracks in a DAW. Ordinary soundcards typically have terrible A/D conversion and probably your Alesis is much better. You will have the problem of syncing the 2 pairs of tracks, but that is not so hard to do by sliding the tracks back and forth to line them up in a DAW.

Re: 2 soundcards to record 4 tracks. [SOLVED]

Posted: Thu Nov 08, 2012 8:03 am
by English Guy
Hi
I set up jack for the alesis & then added the soundcard.

I would not relish trying to sync tracks after 2 passes. I do not think the cassette transport is that reliable & minor variations mean you could be on to a hiding to nowhere.

Ultimately 'the proof of the pudding is in the eating' & this worked.