Old 09-07-2019, 05:43 PM   #1
toleolu
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Default Match Tempo On Two Different Tracks

I've got a drum track that a drummer recorded for me for a cover I'm working on. Online, I found a piano track that I want to use with the drum track. They match up pretty well tempo wise, but I do need to tweak things a bit.

I've played around with rendering the piano track at different BPM's, the drum track is at 123. And I've been able to get it pretty close, but there's just those places where things tend to drift a bit because they were recorded separately.

No problem cutting up the piano track to make things fit better, I suspect Reaper has a built in function of some type to match tempo between two tracks, any info on that, or other suggestions would be appreciated.

Thanks
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Old 09-08-2019, 04:55 PM   #2
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Tutorial Import Chords or Tempo Map from Audio to Reaper

ReaTrak set item bpm and fit to project tempo map

right click Save Link/Target As
ReaTrak set tempo mapped items in selection to constant tempo.lua
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Old 09-09-2019, 09:40 AM   #3
toleolu
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Thanks Bob. Just so I understand with respect to the script.

My project and drum track is at 123 BPM, I don't want that to change. I downloaded the piano track and rendered it to 123 BPM but as I mentioned, it tends to drift out of time with the drum track.

So using your script, I can apply it to the piano track, set it for 123 BPM, and it will do it's magic, correct? Have to admit, I've never used any scripts before so I'm a total noob on that kind of stuff.
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Old 09-09-2019, 02:22 PM   #4
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If it's the drums that go out and the piano is ok then tempo map the drums with Sonic Visualiser or Audacity.
You can then change the drums to a constant tempo of 123bpm and drag the piano track in.
If you want the keep the tempo map then drag the piano in and fit it to the Drum tempo map with the ReaTrak script, it may be easy to install ReaTrak if you have not used scripts before as this will make things easier with the press of a button.


https://www.youtube.com/watch?v=WjLwSENYnso

Also Kenny has great video on quantizing drums


https://www.youtube.com/watch?v=8bCnk5kPkKA
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Old 09-10-2019, 07:51 AM   #5
toleolu
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It's looking like applying Kennys video on editing the drums, to the piano track is going to work best.

I tried stretch markers in a few areas and that worked to line up things up better, but really screwed up the tone. I had the option selected to maintain pitch but it still sounded like crap.

I'll keep playing around with it. Thanks for the suggestions Bob.
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Old 09-10-2019, 10:00 AM   #6
toleolu
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Actually, looks like, in this case, doing dynamic splits and inserting stretch markers at the splits is going to work. It's going to take awhile, but it's got things matching up pretty well without degrading the audio of the piano track too badly.

Thanks Bob.
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Old 09-10-2019, 01:44 PM   #7
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Yes stretch markers do that, that's why I added an option to add on each bar rather than each beat to help, if you have the stretch marker occurring during a held note you get a glitch.
Reaper needs to be able to fit a constant tempo item to any tempo map like other DAW's
see :https://forum.cockos.com/showthread.php?t=216497
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Old 09-16-2019, 05:48 PM   #8
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do I hear you correctly?

the drum track is OK and is 123 bpm
so it can just be imported as is... true?

then with the project bpm at 123, have you tried importing the piano from the Media Explorer, with tempo match set to ON?

that might get you very close, leaving only a little stretch marker work if needed...

worth a try anyway
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