Quite interesting result of "disassembling" square wave with Fourier transform and "assembling in different order"

Old school way - recording with vintage gear. Disclamer: video is not mine.

Lowrey Organ model D-575. "Cotillion - 1983 - Theatre organ with memory presets and extensive features, including human voices and other sound effects" (from Wikipedia).

This is... virtual synthesizer. Works in browser, mobile-friendly. I've tried my best to get maximum performance from Web Audio Api.

GitHub: https://github.com/valent-in/pulseq/