Welcome to the forum. That's a great first question.
Most BIAB styles have two substyles, A & B. A appears blue at the measure number, and B appears green. The B substyle is 'busier' sounding in most styles and also plays throughout all middle choruses (2nd time through, for example) by default, and you can change that setting. By 'busier', I mean for example that you might usually hear more intricate drum patterns and a walking bass.
By pressing F5 at any measure, you can change the style from that measure on.
You can also select a timebase of half-time or double-time for most tracks, using checkboxes within the RealTracks and RealDrums pickers, for many instruments but not all.
But no, I don't think BIAB currently has a style that changes to double-time feel within that style. Anyone else?
BIAB 2026 Win Audiophile. Software: Fender Studio One 8, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Fender Quantom HD8 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.
Hi Jazzman - let me join Matt in saying welcome to the forums.
Coincidentally I was working the other day with a Jazz standard from my archives that has a 12-bar tag and the first four bars of the tag are double time. This was done using the Bar Settings dialog. So I'm thinking another way to answer your question is as follows:
In the Bar Settings dialog for the first bar of the song, set the Tempo change to double the tempo (e.g. 75 x 2 = 150), and set it applicable to the second chorus.
Note: Doing this is a simple doubling of the tempo for the second chorus only, and doesn't address the aspect of 'feel.' Also, doubling the tempo of a Realtrack created for 60-90 beats per minute could sound unnatural at 120-180.
In the StylePicker you can check out the memo box for any difference between the A and B parts, but you can apply a style change like mentioned previous and set the style or RealTracks to be double time or half time. I've attached a file so you can see how to do it in the StylePicker for the RealTracks listed in the Style.
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