Hmm, organ sounds?

[JimRayden]

I want to know what the sound of a classic electric organ consists of. Is it just the sines of six frequencies running into a phaser circuit? My Vermona organ has six controllers that seem to add additional harmonic notes to a single key. Does that mean it uses six sine generators per key?

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Jimbo

[Nasse]

Hammond organs (and some other too) had mechanical "tonewheels" but Vox and Farfisa are done electronically I believe. Cheapo organs were filtered sawtooth or something. I think you can find a picture of Hammond tonewheels, some forum members posted cool Hammond links long ago when discussing Leslie. Dunno what Wurlitzer theatre organs used but cool audio demo files and free program here http://www.virtualorgan.com. I think the waves are in fixed sync, not phase sifted

Maybe it was with organ circuits when they invented "additive" and "subtractive" sound synthesis

[Paul Perry (Frostwave)]

What ifs 'magic' about lightweight organs like (I think) the old Vox, is that E, G, B etc each has its own oscillator which is divided down for the octaves. So, like a guitar, the frequencies in a chord aren't locked together (especially today, now the soft cored coils in the oscillators are crumbling...). On the other hand, an organ with a "top divider" chip, has a fixed frequency relationship (not COMPLETELY even though, so some beating).

[glimmertwin]

One time a long time ago I wanted to make my guitar sound like a Farfisa because I loved that sound so much....finally I bought a farfisa and learned to play it.  Life was pretty good...but recently here after this fairly recent interest in tinking with stomboxes, I have revived the idea of maybe one day making my guitar have that slightly vibrato(ed) reedy organ sound with limitless sustain.  Maybe even some toggle swithes for the different organ voicings. 

Right about now I wish I hadn't sold that farfisa and got a computer program instead.....computer programs aren't near as interesting to look at when you open them up as a crusty old italian organs are...

Thinking out loud again...

[Herr Masel]

What ifs 'magic' about lightweight organs like (I think) the old Vox, is that E, G, B etc each has its own oscillator which is divided down for the octaves. So, like a guitar, the frequencies in a chord aren't locked together (especially today, now the soft cored coils in the oscillators are crumbling...). On the other hand, an organ with a "top divider" chip, has a fixed frequency relationship (not COMPLETELY even though, so some beating).

Hello, would you mind to explain that again please? I don't get this all, but maybe I need more synthisizer general reading knowledge.

[MartyMart]

 you need 9 "drawbars" for a typical Hammond organ setup, to include all the harmonics
and get that choice of "thin" to very "fat" sound.
The DX7 got close, I think you could simulate "6" harmonic tones, from it's FM sound
generation ( pig to program, without a physics degree !! )
Until the software "virtual hammond's" like the Native Instruments B4, there was nothing
that got close enough for me, perhaps the Korg C3 running through a real leslie, was the
"next best" thing,   LOUD and making your trousers "Flap" !
Nine oscilators, some filters and nine volume controls   etc etc...... !

MM