Hi Lyn,

A CC will work for the duration of a note while velocity only works at the note's onset. Thus a CC will have little effect on velocity. This may be what you are experiencing.

Velocity is usually used for layered sounds. That is you will get different variations of a sound (mp, p, f, etc.) with a certain velocity. This of course depends on the number of layers. If it is not a layered sound velocity is used for the initial volume of the sound's attack.

I have been reading in another forum where someone was trying to use a CC to change velocity during a note's duration because as you know it is not only volume that changes with layers it is also timbre, harmonics etc. They wanted those to change along with volume. This can be only done by morphing between those layers and morphing can only be done if your software will allow it. Virtual instruments like SampleModeling's instruments allow morphing thus they are the most realistic sounding brass and woodwinds IMO.

I hope this helps.

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