I have an edirol UA-5 (
http://www.roland.com/products/en/UA-5/index.html) and it works great except that the impulse timming is different everytime i take a measurement even if i don't change delay settings. The impulse graph will show the arrival up to +/- 2ms different with the same measurement repeated. I heard this is some sort of soundcard time sync issue with the recording start not being synched with the play start. Is this correctable with the REW software or is there some other approach to fixing this in general or with the UA-5 in particular?
Thanks a lot.