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Anyone out there know the answer to this? When mastering a Loop CD with a 60min evolving loop performance I had trouble splitting the long piece into 6 tracks ( he wanted this to help him listen to the various sections. I split the track up into 6 .wav files (Cool Edit Pro) and then reassembled onto CD (Nero), with 0s pause beween tracks. This produced clicks on the changes from one track to another. I know why this happens, because the CD format works with blocks of samples, so if your .wav is not an exact number of blocks in length it will be truncated. This means that the rejoined sections are then discontinuous, so there's a click. I notice that on commercial CDs that segue (most of Zappa's for instace) the transition is OK, but if you play just one track there's often a click at the beginning or end. I assume this is because the tracks were edited ro exactly the right length for the CD format, and this meant that the change from track to track would only fall onto a zero crossing point by chance. So:- Does anyone have the info 1)How to get round this? 2) How to calculate the length for a .wav file so that there's no truncation? 3) What is the Block size? 4) There also seems to be an issue with the CD format trimming a very small section from the beginning of a .wav, anyone know what's going on here. Well the guy I did the mastering for couldn't hear the clicks, but I reckon this is an issue for the making of loop CDs generally, as it seems very natural to want to split a long piece into manageable tracks (at least some of the time). thanks andy butler