The Korg G4 Leslie simulator arrived today, and I've been messing about to
get a feel for the sounds it can produce. Here's a very meandering
mess-about with a two-chord backing and improvised 'melody' (ie, somewhat
random series of notes)...

http://www.melodolic.com/Music/HammondTest-02.mp3

Same deal with recording - straight into the minidisc unit, then dumped into
the PC using the minidisc portable. Converted to 256 mp3 to keep the size
down.

At times, I feel the Leslie sound is a bit strong. The G4 has settings for
balance between the rotor and horn, and simulated mic distance and spacing,
which all seem to affect this, so I'll play around with those a bit more.
Given that I'm not a real Hammond player (not a real player, and don't have
a real Hammond), the simulation sounds pretty convincing to me. I like the
passage where I dialled in a little overdrive.

I'll need to do a session of going through all the Hammond sounds that my
MIDI module has (about 25 to choose from) to see how they work with the G4.
There are also possibilities in layering the sounds - the voices on the
module can be set to respond to any MIDI channel, so sending on one channel
can trigger a mix of sounds. For this recording, I used the standard sounds
and split the keyboard - left hand plays the percussive sound, and the right
is playing both percussive and normal sounds layered together (probably not
authentic).