Adjusting duration of a few notes

Insert tempo changes at the beginning and end of the measure you want to change, and adjust the first tempo change to get the timing you want. The second tempo change should match the initial tempo of the project in order for the rest of the project not to be affected by the slower tempo for the one measure.

If you played notes so early that they're in the previous measure, or some notes in the measure are early while the rest are okay, you may need to move events as well as changing the tempo. Hard to say exactly without knowing that you've got.

Can I simply select all of the notes in the Piano Roll View that come after my speed problem and drag them down the timeline by a half second or so and then lengthen the individual notes as needed?

Yes, if you don't care what relationship the notes have to the timeline, you can just drag everything later. I've done this to adjust the timing in rubato pieces I've recorded without a click.


But if you played to a click, and want the subsequent measures to maintain their relationship to the M:B:T grid, you'd need to slow that one measure down with tempo changes as described.


Be aware, however, that dragging notes in the PRV can be a little slow and erratic when you have a lot of notes selected.