, Cherry Audio’s Eight Voice polyphonic synthesizer meticulously emulates the immense sound of the Oberheim Eight Voice, one of the world’s rarest and most desirable vintage instruments. Predating modern microprocessor control, its eight independent dual-oscillator voice modules could be challenging to program.
It's a spreadsheet. You can add values to cells, ask it to average a range.
It's a synthesizer. You can ask it to generate a sine wave based on time, and output it through your speakers. Add an ADSR envelope, modulate the frequency based on MIDI input note, put in some filters and hey, it's an actual instrument.
Sassy includes over 100 functions, including some that largely make sense in a spreadsheet way (like finding maximum value out of a range) and others that largely make sense in a synthesizer way (like high pass filter, various waveform generators, delays etc) as well as a whole lot that make sense in both (like trigonometry).
Analogue Solutions who are always taking things up another notch, have reinvented their well known Leipzig Synthesizer with a brand new Version 3 for 2021. Of course it is the same as the old synth, only better!
This instrument's sound engine works like a granular sampler, however instead of manipulating bits and pieces from a sampled sound, it uses mathematically generated "bytebeat". A very interesting thing on its own, a kind of fractal where complex structures emerge from a very simple formula. T-ape allows you to hear it, browse, zoom, cut and mangle its most interesting pieces and arrange them into sequences, arpeggios or just play directly using eight touch-sensitive keys. There are two light sensors too, adding a kind of Theremin-like functionality.
The Electronic Music Education and Preservation Project (EMEAPP) acquired the legendary TECHNOS ACXEL Resynthesizer last year and have posted a feature with extended overview of the system. I was quire surprised to find how advanced and unique this system is even by today's standards.