Bob,

Is the melody a midi melody or a live playing? Also, do you have the song set-up so that when the style changes it changes automatically for the second 12 bars?

If you have a style change from Midi to Realtracks, BIAB needs to generate the Realtracks and doing this requires a hefty amount of the computer's processor if "Fast generation of Realtracks" is enabled. The reason for this is that BIAB will commence playing before the Realtracks are fully generated and the completion of generation occurs as a background process. Now, if you throw into that mix the fact that you are also asking your computer to record audio, there's a lot being expected and the computer will share the processor between events. By comparison, generating a Midi-only accompaniment is fast and efficient and does not use too much computer power.

As an experiment, try deactivating the fast generation of Realtracks under "Opt | Preferences | Realtracks" and see if that makes a difference. With this turned off, the song will not commence until all Realtracks are complete so it will take longer to start up. The upside is, though, that if you are recording, pretty much all processing power can be devoted to that.

Hope these thoughts help,
Noel

Last edited by Noel96; 12/26/11 10:57 AM.
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