SetBfree
A DSP Tonewheel Organ emulator.
setBfree is a MIDI-controlled, software synthesizer designed to imitate the sound and properties of the electromechanical organs and sound modification devices that brought world-wide fame to the names and products of Laurens Hammond and Don Leslie.
https://github.com/pantherb/setBfree
Hammond A100:
Hammond B3:
SetBFree engine presets behave a bit differently from other engines, to emulate a feature of the original organs. The keys at the left end of the keyboard (with colors reversed) select drawbar presets, changing drawbars only and not other controls. (This is a bit of an oversimplification, as it also disables percussion for presets other than the rightmost two.) This allows the player to quickly change drawbar settings while playing, without affecting the scanner (chorus/vibrato), Leslie speaker rotation speed, volume, etc.
To emulate this, Zynthian stores only drawbar settings for SetBFree presets. If you want the ability to save and restore full settings, use ZS3's.