Sony's synchro is pretty good. Are you doing optical or analogue recording? For short bursts, manual is best, but for entire albums, it is good to use synchro, which will synchronise your recorder with a very very small output form the source. The only problems this will incur in analogue recordings is in songs that use silence to stretch the time out. Then, the recorder will default to a new track when the music comes back on. If you are recording albums like this from an analogue source, then it is fair enough to use manual recording and afterward, add track marks between songs.