I remember a book that was sold during the Hammond B-3's peak years that gave drawbar settings that were to make the organ sound like strings, clarinets, brass, even bagpipe...I still remember they emphasized drawbar "shapes" that the ends of the bars made when pulled out like e.g. an inverted or concave "bow" shape.
Then, of course, there were the numbered
registrations like "88 8000 000, Percussion On, Soft, Short, Third Harmonic" which was your basic
Jimmy Smith tone.
Or a "reeds" setting could be 00 4632 10 and the shape resembled an inverted sawtooth wave.
I seem to remember the Piano/Vibes/Xylophone setting was "00 0000 000 Percussion On, Normal, Long, 2nd Harmonic" and, because the percussion only triggered when all notes were released, it took a little practice to get it to work right. If you needed more body and sustain, you added the 4th drawbar to taste.
This was often advertised as if to convey the "synthesizing" aspects of the B-3...it could be thought to be analogous to that of a fixed-envelope
additive synthesizer.
Did it sound like the instruments? For the time, it was reasonably good, and, of course, like our arranger keyboards, it very much depended on the skill of the player to produce these imitations idiomatically.
Some bore a closer resemblance than others...I remember the bagpipe required the "reed" drawbar setting, "stopping" the Leslie Horns, and holding down a key for the drone and playing notes above it. Switching off the organ would give the pitch drop as the bagpipe's bag slowly deflated, but that detail wasn't encouraged by the manufacturer.
Around that time, the Mellotron was just coming out so it took over the role of making orchestral sounds for keyboardists.
Most Hammond players, including yours truly, just grabbed the bars and pulled them out (often a few or more at a time) until the organ produced the sound they needed, and moving them in and out while playing a lead line sounded pretty cool, sorta "sculpting" the tone.
I like Spalding's post above...it reflects a lot of my thoughts regarding the idea behind, and usage of, the arranger keyboard.
I mainly use my Tyros4 to create little orchestra or band
replicas (or "scenes"), depending on the genre of music and what I'm trying to emulate.
I feel that the B-3 went from being an
imitative instrument (pipe organ, synth etc.) to becoming an instrument that keyboard manufacturers did their best to
imitate eventually producing the gaggle of clonewheels we see in recent years.
As good as some are, I still don't feel any one clonewheel manages to replicate ALL of the Hammond B-3's characteristics, but they do manage to bypass one attribute none of us really ever warmed up to...the B-3's weight and bulk when it came time to move it, especially after a long night of playing.
Ian
PS...Spalding, Cory Henry's playing is impressive, to say the least.