phone emf → pitch · noise floor → volume · spectral complexity → timbre · runs locally
your phone is electromagnetically loud.
move it close · rotate it · run different apps · the interference is the instrument.
getUserMedia (echoCancellation/noiseSuppression/autoGainControl all off) · AnalyserNode FFT 8192 · dominant bin tracking · noise floor calibration · exponential pitch glide · theremin synthesis with vibrato + AM tremolo