The Martinic Kee Bass VST/AU plugin is based on the original electronic schema and an actual physical Kee Bass. Firstly Martinic modeled the instrument precisely (no sampling at all), then a few modern features were added to make it more versatile and unique, such as an extended range, a filter, and modulation.

Features:
Physical modeling (no samples used) of vintage Rheem Kee Bass
Bass Fuzz sound - built in
Percussion - Fast decay
Percussion - Slow decay
Sustain
Bright-Mellow option on all sounds
2 Full Octave Keyboard
Modeled Solid State Electronic Circuitry
2.5 MB Portable Lightweight Beauty
Plays Booming String Bass Notes when loaded into any VST/AU host

Advanced Features:
Level adjust
Adjustable 25-note tuning
Extended 128 MIDI note range
Velocity-sensitive
Pitch bend ±2 semitones
All settings MIDI learnable
Poly mode
Low/high/last note priority
Attack/decay adjust
Low pass filter with resonance
Filter LFO/envelope modulation
Wide range of presets
Fine tuning
Transpose/octave shift

PLATFORM: VST

Whats New:
Updates: official site does not provide any info about changes in this version.

HOMEPAGE

https://www.martinic.com/en/products/kee-bass