Lampdog wrote:any way it makes the playback off.
The metronome is the machines timing, no it doesn't.
What you are hearing that is off is you, unfortunately. Learn how to manipulate the timing. There's only your understanding of it standing in your way.
co sign.
the timing correct put the notes you record into predefined slots along the time line, so if it's set to 1/16, you have 16 slots per bar. if you miss the 'slot window' (by that i mean you have a 16th of a bar in seconds to play a note for it to go in that slot) by a tiny fraction, the mpc will put the note into the next slot or the previous one, which can be a dramatic change and make it sound like crap. try turning the timing correct off, or to a higher value, this'll give you a higher resolution of slots, so any mistakes you make won't move as far.
failing being able to play in time, there's always the grid edit screen in the JJOS or step edit with which you can move the notes around afterwards. fine if it's one or two, but learn to play in time, and you eliminate this 'housekeeping' altogether.