I have EZDrummer 2 and Addictive Drums 2 and they are both great options. However making a quick but convincing drum track via BIAB is still a great feature and anything we can do to further improve the flexibility would be brilliant I think.

Often it is only the drum track and maybe a guitar track that I use from a BIAB song. I normally add my own bass line via Trilian and then add my own guitars and keyboard tracks. I also often add a bit of cymbals from a VST drum program especially for endings.

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http://tonycliff.bandcamp.com