This could be tricky. Biab can handle the tempo change ok but it would have to be a all midi style, no RT's because they're audio. You could try putting a part marker on each of your 4 bars to generate a drum fill and possibly come up with something. Real Band may be best for this because you can probably find a midi file of what you want or something close with a drum part that could work and paste in that section to go along with the rest of your Biab generated midi drum track.

Bob


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