You guys have to check out this story about three musicians who build sound around test equipment instead of digital tools! First there's Gabor Szabo, who owns a collection of old oscilloscopes — several vintage Bredt models and one he built himself from scratch — and uses them as textures because aging circuits add character that software can't copy. Then EEMATIK collaborated with Sacha Polonovski to build their synthesizer around an actual 1954 oscilloscope circuit, creating harmonic saturation through the instability of old components rather than feeding it THROUGH a filter. And Tim Porter has an Allen Bravo C02 Oscillograph (a compact portable unit from the late '80s) that he plays in front of audiences as a visual performance tool while improvising live sets. The whole idea is that these tools aren't instruments — they're partners in composition, and the texture you get from old analog hardware tells stories that digital can't match!

Source: https://www.musicradar.com/music-tech/synths/these-are-better-sine-waves-they-just-are-we-meet-the-people-using-test-equipment-to-make-music