I'm not sure I understand what you're asking.... Are you recording a track, but want to record data over top of what you just recorded meaing (overdubbing) another part onto the same track? If so the PSR's won't record this way. Their sequencers are a little different than synths. On the PSR's when you record data overtop of something you already recorded, it will replace your old part with the new recorded data.. Now if you want to go into the track and re-do something or add something in between parts you can do punch in recording, but when you punch in it too will overwrite the already recorded data and replace that with what you added.. Hope this makes sense..

Squeak