Cockos Incorporated Forums - View Single Post - How to change BPM w/out stretching midi notes (so they still sync with audio)?

planktonic_tcw · 03-25-2009, 03:21 PM

I've searched high and low on the forums, tried timebase changing (time vs the 2 beats settings), locking, etc to no avail.

Here's my scenario:
I make a live recording, recording multiple midi instruments and also multiple audio sources. I haven't set the tempo to anything in particular and we aren't using a click track.

Later when I'm mixing I want to add in tempo based effects, like delay, etc. so I tempo tap to get the project BPM to match the actual performance BPM. Then I can have the effects use the host bpm. But when I do this, the midi notes shift to match the new tempo. I'd prefer not to stretch the audio, since I want to preserve the actual tempo that occurred at record time.

I've tried changing project/item timebase setting to the three different values but with all of those setting the midi notes themselves still shift, and are no longer in sync with the audio.

A solution/workaround would be to make sure I just set the tempo on each song before I start, but that task is sometimes forgotten or is impractical, or for whatever reason, so I'm hoping for a simple fix during the mixing process.

The closest thing I could find on the forum regarding this is:
http://forum.cockos.com/showpost.php...0&postcount=10
which suggests that there isn't an easy way and gives what looks like a fairly time-consuming process of splitting each midi note, but maybe I'm misreading or there is a way to automate the process.

03-25-2009, 03:21 PM	#1
planktonic_tcw Human being with feelings Join Date: Jul 2007 Posts: 13	How to change BPM w/out stretching midi notes (so they still sync with audio)? I've searched high and low on the forums, tried timebase changing (time vs the 2 beats settings), locking, etc to no avail. Here's my scenario: I make a live recording, recording multiple midi instruments and also multiple audio sources. I haven't set the tempo to anything in particular and we aren't using a click track. Later when I'm mixing I want to add in tempo based effects, like delay, etc. so I tempo tap to get the project BPM to match the actual performance BPM. Then I can have the effects use the host bpm. But when I do this, the midi notes shift to match the new tempo. I'd prefer not to stretch the audio, since I want to preserve the actual tempo that occurred at record time. I've tried changing project/item timebase setting to the three different values but with all of those setting the midi notes themselves still shift, and are no longer in sync with the audio. A solution/workaround would be to make sure I just set the tempo on each song before I start, but that task is sometimes forgotten or is impractical, or for whatever reason, so I'm hoping for a simple fix during the mixing process. The closest thing I could find on the forum regarding this is: http://forum.cockos.com/showpost.php...0&postcount=10 which suggests that there isn't an easy way and gives what looks like a fairly time-consuming process of splitting each midi note, but maybe I'm misreading or there is a way to automate the process.