[QUOTE=soniclover;1188755]When using a single comp-row I used to cut some sections and moving them forward or backward in order to improve their timing. I then use the time-strech function on the other slices to close the gaps. When listening to the whole clip the timing has of course improved but I hear too much clicks and artefacts. Then, I have to maually adjust the levels in the transisions in order to get a perfect result, and this takes a lot of time. It would be nice if Reason had a function like "smoothen clip transitions" or "automatically create crossfades" and does this work for me. (Doubling the comp-row doesn't help in this case).
I found a solution after all:
1. You have to "join clips" first and then make crossfades.
2. If you still hear clicks it's because you have some cuts in the clip which you can't see at first sight. Zoom in to where the clicks are and remove the hidden cuts. The audio track should be perfect now.