Hi! ecasound can do offsets. You have the new features (ecasound 2.5.x): ecasound -a:1 -i a0.wav -a:2 -i a1.wav -a:3 -i b0.wav -a:4 -i playat:396.000,b1.wav -a:all -o output.wav You get the jist of it. Another way... You might try something with with the unix magic tools awk and sed. Ecasound has .ewf files, which seem similar in function. An EWF-file can manage one input (to my knowledge) It would look like: a1.ewf source = a1.wav offset = 396.000 You could try to split the .lof-file line-by-line and output seperate .ewf-files. I don't know how exactly. If you need help, I could think about it or someone else here, may do it even quicker. Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de