RoLo kirjoitti: > 2. Can somebody explain me what is jack and how to use it. Maybe this helps, I just found it. "JACK Sync: A Primer For Linux Users" http://www.linuxjournal.com/node/1004080 Dave Philips's articles are always good to read and learn. http://www.linuxjournal.com/user/800764/track Best Regards Asmo Koskinen.