Tapping F8 has always worked here.
Clicking and dragging the first bar line to where the song starts makes a huge difference. Seems to give RB a good foundation to start analyzing from.
RB usually gives a pop up with options after moving it (Set Bar 1 type).

I usually select 'Use Whole Song' or similar in the initial pop up when ACW starts, so you aren't basing your adjustments on a single (possibly) out of time track.

I made a basic video of using ACW back when it first came out.
It's very old and my mic audio sucks, but it explains the basics.
http://masteringmatters.com/stuff/ACW_Tempo_Map_creation.avi

One key point is the initial pop ups need to be paid attention to, as shown below..

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Last edited by rharv; 01/01/25 09:50 AM.
I do not work here, but the benefits are still awesome
Make your sound your own!