Available directly from NUSofting for Windows and macOS (VST2/AU).
: The modern, paid version is available as Peti SA on the NUSofting website.
: Unlike standard samplers, Peti used a custom FM/PM synthesis engine to model the actual physical vibrations of reeds.
While Peti has its own grit, running it through a high-quality tube saturation plugin can make it sound even more expensive.
to shift keyboard pitch while retaining the same fingering, and a Keyboard Coupler that plays two notes simultaneously (octaves or fifths). Legacy Beta Version Peti Harmonium/Accordion VSTi betatesting 0.5x - Page 4