Couple things about RB/realdrums, and they have been mentioned before.

1. In RB you can generate many takes of the drummer experimenting with different variations (image below) .. sometimes what you are looking for is in a different variation, and if you don't experiment you'll never find it (same with recording a real drummer, except you get to explain what you want with a real drummer), though what you get will vary, much as it does with RealDrums variations. I have been known to generate many realdrum tracks and paste them together and sometimes those variations over a given A/B section make a big difference.

2. At the end of many of the actual RealDrum wma files (or wav files if using the audio version) you'll find actual recordings of many of the drum hits on their own, these can be edited to be 'samples' which makes using a sample player to create your own fill (or add to one) an inviting option for editing since they sound like the same drums, *if* you like the rest of the RealDrums you have generated.

If you are genuinely not happy with the generated RealDrums, well that's a whole 'nother problem and how to proceed depends on a lot; your abilities with MIDI, your abilities with cut/paste (or slice/dice) of audio .. your ability to manipulate another drum generator .. lots of variables.

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