How to change tempo without altering midi data

I don't want to use that Fit Improvisation nor set measure beat at now feature because it's tedious and cumbersome
 
I just want to keep my midi data intact while I changing my project tempo!
 
It seems Cilp locks and position feature doens't work at all
 
How can I change tempo without altering all of my midi data??
 
PS : Does fit Improvisation feature only works one time in a project???

Have you tried freezing the synths...? 

That converts the midi data to audio. 

TR is right, when you change the tempo the midi data will always follow it. 


I've never done what you say you're wanting to do, but I'm guessing that if you freeze the synth, the audio will act like audio and NOT be affected by the tempo change. HOWEVER, if you ever needed to unfreeze the synth to change a note or something else in the midi track, as soon as you unfreeze it, the synth will see the new tempo and will immediately apply that tempo to the music. 

You can also do a BOUNCE TO TRACK  at the original tempo. That eliminates the synth connection totally and renders the music to audio. That would be totally unaffected by tempo changes.  Just understand that all midi WILL be affected by tempo changes. 

Another option.... work between 2 different projects to keep the midi at one tempo and the audio at another. Copy & paste the bounced audio from mid tracks into the strictly audio project at the different tempo. 

I don't understand why you might need to do this, but if I was going to attempt it, with no further understanding... that's how I would do it..... or at least that's how I would attempt to do it.

I don't know Kevin's situation, but I've had situations where I've wanted to do this.  It generally happens like this:

1.     Band is recorded live without a click track.  Drums or synths are recorded as midi tracks.


2.     During the mixing stage, I may want to adjust the project tempo to match what was played.  But if I do so, it messes up timing of the midi tracks.


The only solution I've come up with is freezing the synth tracks, which reduces the flexibility of recording to midi in the first case.


Brian

I don't want to use that Fit Improvisation nor set measure beat at now feature because it's tedious and cumbersome   I just want to keep my midi data intact while I changing my project tempo!   It seems Cilp locks and position feature doens't work at all

Set Measure/Beat At Now is pretty much your only option. Lock Position does work as designed, but it only locks the start time. Nothing else will keep MIDI from following a manual tempo change.


But SM/BAN is a cinch if you just want to change the whole project tempo without affecting MIDI. Just set your Now time at the measure matching the current tempo plus 1, and Set Measure/Beat at the target tempo plus 1. If you need to set a tempo that doesn't start at 1:01:000, you'll need to do some more figuring, but it's still pretty straight-forward unless there are a ton of changes to be made.


The one other option is to make your tempo change, then use Process > Length to stretch/compress the MIDI clip by the same percentage. So if you went from a project tempo of 100 to 125, you'd change the length by 125% to slow the MIDI back down to what it was.


You might need to do all this after changing the Timebase of MIDI clips to Absolute, and locking position if you have clips that don't start at 1:01:000, and you really don't want them to not follow the change in musical time at all.