Dodo MIDI is a free voice to MIDI plugin, it detects the incoming audio, which can be voice or musical instruments, and controls the pitch and volume of any synthesizer or sampler you connect to it.

Les musiciens ont tendance à faire le plein d’équipement de la plus haute qualité possible, guitares cool, interface audio avec de bon préamplis, des pédales d’effet à n’en plus finir, des mélangeurs, des claviers, des amplificateurs, et on en passe! Et s’en suit la sélection d’une poignée des câbles les moins chers à portée de main pour relier tout ca et c’est parti!

Perfect geometric shapes only occur when using Equal Temperament. Sonically though the intervals of Equal Tempered instruments/music aren’t perfect (accept for the Octave). They are always a bit sharp or flat in comparison with the Harmonic Series (how sound occurs in nature) and Just Intonation.

https://roelhollander.eu/blog-music/music-geometry/#ctt

Delia Derbyshire, the British electronic music pioneer, produced Ron Grainer’s famous “Doctor Who” theme

https://www.thevintagenews.com/2017/02/27/delia-derbyshire-the-british-electronic-music-pioneer-produced-ron-grainers-famous-doctor-who-theme/

Tour Berna3, a complete 1950s electronic music studio in software – tape loops to test oscillators