I've heard that one of the biggest things sleep does in this area is helping you fuse together small sequences. When learning a long sequence of actions be it m

I've heard that one of the biggest things sleep does in this area is helping you fuse together small sequences. When learning a long sequence of actions be it musical or whatever, people learn chunks of smaller sequences (ie. learning to punch in the sequence 486142041 might be broken up into 4861-4202-41 with pauses inbetween that seem impossible to train out of you. As soon as one sleeps through, people suddenly are able to rattle off the whole sequence without the pauses. This is obviously essential for music.