I've been looking for ages for a command line software that will assimilate 2 mp3 files inside another.
I repeat, not 1 after the other, but 1 INSIDE the other. Like karaoke music and voice playback assimilation.
Preferably with the option to delay 1 of the files to assimilate (for synching purposes).
Don't care if it's free or not. Willing to pay for it.
Thanks a lot :)