How to map an audio ritard

The tempo slows gradually at the end of a song, single audio file track. I just want the beats to match the metronome subdivision, But using time warp, I can’t add anything in the middle of a measure, it just moves the next measure marker to wherever I click within the measure. Seems like it should be simple but I’ve gotten nowhere, wasting hours.

Take a look at this video

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You might want to fix the typo in the thread title :grinning: .

Already watched and used that video but had the problem described. Couldn’t insert new warp points in middle of measure. I got some points there by adding to the tempo track, but they don’t match the measure subdivisions. If I try to move one, then the warp point at the next measure moves there. I can’t just insert a warp point either. What is shown in that video doesn’t happen in this case.

I think I finally solved it. The grid was set to bar line and I took that off and also set to quantize, then I could add points in the middle and move them to beats.