Harmodion is an organ and a free-reed aerophone virtual instrument, which includes electronic, clonewheel drawbar, transistor and combo organs, as well as reed harmonium, flutina, accordion and bandoneon. It uses additive synthesis allowing to manipulate harmonically the sine waveform components to produce pitched sounds, as well as to individually detune those components to produce inharmonic timbres. A set of sliding drawbars are used to mix the various harmonic components generated by the tonewheels emulation in order to synthesize a wide variety of sounds. Available as plugin in VST 32 bit and 64 bit and VST3 64 bit versions for Windows as well as in Audio Unit for macOS.