Mutant Koto is a simple VSTi that implements a plucked string model using two strings that can be detuned and coupled, first-order loop filters on each, controllable quantization of the coupled signal (called 'leakage' in the synthesizer) and a warped IIR lattice filter applied either to the leakage or to the output stage.

The maximum order of the warped lattice is 30 and the preset filters were derived to very roughly model some of the body resonances of the named instruments, along with a formant filter and some random filter choices.

Other features:

• Microtuning support.
• MIDI CC control of some key parameters.