This kind of gets me thinking about using an "expression pedal" for my Tyros 2 like when I was doing organ. It's a lot of fun and really adds a lot of emotion to the music.

To me inflection is what music is all about and using an expression pedal can make a huge difference in the feeling you can put out.

In general as the melody line goes up give it more gas. When the melody line descends back off. You can also hit a note or chord, back off and then crescendo, then end abruptly, or if its' a long note you could also decrescendo to a whisper.

I think you will find it easiest if you think like a horn player, a horn section or the horn sections of a big band. The whole band you will find changes volume together. To me not having the volume of the rest of the band change also would take away from the emotional impact, unless you were trying for a special effect.

You can use the pedal not only for organ, but just about any instrument. Strings, solo horn, horn sections, not just organ. But it's the same approach.

Happened to think of this arrangement where the whole band goes through a wide range of volume, from section to section, while adding one section over the other. Note especially when Maynard goes up in the back row with the rest of the trumpets how they milk those dynamic changes. Notice how the whole band changes volume including the drums, not just the top voice{s}.

http://www.youtube.com/watch?v=lHpMIbcEBvY

I will have to admit that Maynard had THE most exciting band I have ever heard live. The ups and down of volume, phrasing, delayed vibrato, bending notes all together was astounding.

There are some great organists that did the same thing. If I think of one I'll put some up. I often used an organ sound trying to emulate say a trumpet section etc.

Have fun with this. This can add so much to a song.

Scott