OK, I'm really newbie with Reaper... All I want to do is that; I have 6 mono files on 6 separated tracks and I want to render them in 1 multitrack files... What is the easiest way to do this operation? Whatever i did result in a multitrack (6 channels) files but with only two fisrt channel with sound on. Please help me, I'll have a lot of files to package in multitrack files and I would like to use reaper to do that. Thanks