How do I change tempo w/out changing midi

[Philthy]

How can I add a tempo change without changing the timing of my already-existing midi tracks?

[Philthy]

Is it impossible?

[mtung]

I would print the midi tracks and then create a different tempo map. You might want to 'save as' before you begin this. You might also investigate the 'renumber bars' command, the 'identify beat' command and also the 'tempo/meter' change window.

mtung

[Philthy]

Thanks, of course printing the midi tracks is not a solution at all, because I want to change the tempo without changing my midi performances. The tempo/meter change window doesn't do it. I believe that the 'identify beat' command is for audio.

Any other suggestions?

[Disco_Doctor]

How about this:

Save a copy of your existing session which has the MIDI tracks the way you want them.

Change your tempo. This will change your MIDI tracks.

Delete all of the MIDI tracks.

Go to File->Import tracks and import all of the MIDI tracks back into the session from the safety copy of the session. Make sure you uncheck "import tempo map" at the bottom.

I haven't tried this...but my educated guess is that you'll end up with what you want.

Might be another way along the same lines: does changing the tempo affect MIDI data on hidden MIDI playlists? If so, you could "hide" the MIDI tracks as unused playlists, change the tempo, then switch back to the playlists that hold your performances. Haven't tried any of this...might work. Let me know...

[img]images/icons/smile.gif[/img]

[Philthy]

Doctor, that might or might not work, but for this situation, I actually need to adjust the tempo map to a performance which was recorded out of time. So I need to see the midi tracks as I'm working.

I ended up doing it in Digital Performer, which actually allows you to snap-drag bar and beat gridlines to midi notes, automatically creating the tempo changes for you. Incredible. Chalk one up to MOTU; I should just accept that this sort of feature is unlikely in any future version of ProTools, and really learn DP.

[davip]

Disco Doctor's solution won't work. The imported MIDI files will conform to your session's tempo map. DP does rock for this sort of thing.