[A6] A very basic mod question

[Don P]

Hi, 

Please forgive me for asking an elementary question, but I am frustrated
trying to figure it out. I just created a patch that sounds like a wood
wind instrument. I want to assign tremolo or vibrato to the key after
touch. I have tried to use the LOF mod buttons and making keyboard
aftertouch the source and all the different destinations. That doesn't
work. I have tried other mod buttons and made key aftertouch the source
with various destinations. What am I missing here? If tremolo is created
by making the LFO as a source modulate Envelope 3's level. How can I
make aftertouch be a source that can make a second source (LFO) modulate
an envelope. It just doesn't seem possible yet it is done on some of the
patches that are pre programmed.

Thanks 

Don