Turn Audio on, pick an engine, then hold the pad — X = pitch everywhere; Y is each engine's main timbre control. Same gesture, different synthesis:
FM — one sine wobbles another's frequency; pick a routing (classic, self-mod, parallel, chaos feedback). Ring — two sines multiplied, gong-like sidebands. AM — a carrier amplitude-modulated; the mic drives depth. PD — Casio-style phase distortion; two fingers split pitch and distortion. Wavetable — morph across eight single-cycle waves. Supersaw — seven detuned saws; spin the phone to widen the spread (Spin timbre: sine + gyro vibrato).
Tour the engines with the same gesture and compare spectra by ear.
Pitch — Hz
Timbre —