Basic Leslie Rotary Speaker

Here is my simple take on the Leslie Rotary Speaker.
This patch is very simple, no reverb, just the rotary simulation.
The sound is going though a SV-Filter, sending bass under 200Hz to the output.
Then the remaining frequency is splitted at 800Hz.
-Lower mid goes in a pitch shifter, very very slight as the doppler effect is less pronounced on bass frequency in a Leslie cabinet. Then in a panner.
This side is controlled by a LFO, 40rpm for slow speed, 340rpm for fast speed as a real Leslie.
-Upper freq goes to another pitch shifter, more pronounced and then in a panner.
This side is controlled by another LFO going from 50rpm to 400rpm.

-Left switch press switch from low speed to fast speed. Ramp is slower for the bass rotor as in real life.

-You can control also the speed slow to fast with a Midi CC (I do so with my Es-8).

I took informations on those pages:

http://www.theatreorgans.com/hammond/faq/mystery/mystery.html?fbclid=IwAR0BRehBYsn7y1tSlHUANvO2DM1XSVbzRW0hx83-RHxxDboO36zqYKV_JCk

https://en.wikipedia.org/wiki/Leslie_speaker

Edit: I added:
-a room reverb at the end to give some more relief and “realisticness”.
-a mix control, so you can mix between the dry and the wet sound. Note that the bass frequency (below 200hz) are routed directly to the output as they are not very affected by the effect in real life.
-I removed the pitch shifter on the low mid rotor, it was creating a “non smooth” curve and was not that necessary

2 comments on “Basic Leslie Rotary Speaker
  • winddealer on said:

    Very nice. thank you for researching, developing and sharing your findings. The Zoia once again shows its value and flexibility. To date, after evaluating multiple Leslie Effect VST products (until I get a Zoia) the UVI Rotary at $75.00 is a great compromise. I’ve not gone fully DAWless “yet” but am on the way. Thank you again. Gratefully. Alt V7

  • klaasklever on said:

    thanks from me as well. i like it – and the the explaination about the design process makes it complete. thumbs up!

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    • Platform:
    • Category: Effect
    • Revision: 1.1
    • License: Do What The F*ck You Want To Public License
    • Modified: 4 years ago
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      Downloads: 1284
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