The plugin API in general does respond to tempo and meter changes, but the DAW does not communicate those changes except when it's playing and only at the time the change happens. Band-in-a-Box has to generate the Realtracks before it can play them, so it has to know the tempo and meter information before the song is played.

I'm not certain if the plugin API can communicate key changes, but the above would still apply - BB has to generate the Realtracks ahead of time, so it would have to know the key changes when it's generating and can't respond to them in real time.


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