I will suggest that you pick the tempo that you want your track to be then in the piano roll view move, truncate, and/or lengthen your played note until you have them exactly where you want them. It takes a little work and time but you will get exactly what you want. IMHO this is the best approach to poorly timed MIDI tracks. YMMV

PS - If your timing is way off then quantize may not work.


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