I have been approached by a friend, that wants to rescue old 4-track cassette tapes. That's a pretty straightforward issue normally, just record 4 tracks in Ardour, mix as desired and export.
The problem will be, is that he does not have a similar 4-track as they were recorded on. They were recorded on a 1x speed machine, and all he has to play it on is a 2x machine. Aside from the unavoidable tape head alignment problems, what is the best way to do this?
One obvious thing that comes to mind is to set Jack for 88.1 khz to record it, and 44.1 khz on playback. The audio hardware is a Delta 66. Is there an easier way? Ecasound has good multitrack capabilities, and has a Jack plugin but I am more familiar with Ardour.
I guess it's better to be running the tape doublespeed, instead of half-speed and trying to speed it up, fidelity-wise.