If you use a velocity switched fast/slow organ sound, you can restrict ALL the velocities to just UNDER the fast vel level, then select the section you want as fast, and just add +1 to the velocities. It works great, and you don't get a big jump in volume when you do it. I've edited a few Roland styles to do that, as you can't use the VK organ section in a style ( rolleyes ) and it works well...
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An arranger is just a tool. What matters is what you build with it..!