Tutorial for creating a tempo change in Beat Buddy using Logic Pro X, part 1

Thanks. Reported that to Apple along with half a dozen other issues.

I have found a method to get this to work for double time and half time. I’ll provide more details tomorrow, but essentially the process involves copying the section that you want to manipulate to a new midi track, and placing it at 1.1.1. Then, for double time, apply the transform, and cut resulting track to just the number of measures you needed. It is going to pull in parts of the midi track that were in the original that you were not trying to manipulate, so you have to delete those. In the case of half time, you need to prepare your copied midi track to double the number of measures you presently have, When you stretch the endpoint to the track your are trying to process, notes from the original will appear at the end of your track. Delete those so you are just processing the portion of the track that you intended. Then apply the half speed, and your processed section will fill the newly created midi region area.I’ll try to post with pictures tomorrow. I tried it with a Bach two-part invention and it worked using this method.

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As promised, illustrated tutorial.

Logic 11.2 transform Tutorial.pdf (1.3 MB)

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Thanks a lot, @Phil_Flood. Interesting to find that there is data beyond the cut region. That could explain the overlapping I saw, must probably had happened when my desired region went double speed, but the rest of the hidden data stayed the same.

If someones is interested, this is how I dealt with this issue when I desperately needed to apply a transformation:

After copying the whole track to a new track, I positioned dummy notes at the beginning and end of the section I wanted to transform, at a velocity extremely different to the surrounding notes (in my case a velocity of “1”). That way, the dummy notes would be a very different color and easy to spot. I applied the transformation to the whole region, which, as stated before, works perfectly. Then I deleted all notes before and after my dummy notes (including the dummy notes themselves) and cut the region to the final length. Then I drag the region to the corresponding spot in the final track and after positioning all parts, I joined the regions in my final track, ready to be exported as MIDI and imported into BBMO.