waveshaping

Waveshaping is a human-made nonlinear signal-processing method that generates harmonics by applying a static amplitude transfer function to an audio signal, mapping input amplitude to output amplitude through a deliberately nonlinear curve. Parameters: (1) transfer function shape — e.g., tanh, cubic, piecewise linear, Chebyshev polynomial — which defines harmonic content; (2) input scaling/gain — sets the operating region of the curve; (3) oversampling factor — used to avoid aliasing of generated harmonics; (4) DC offset correction — prevents shift from asymmetric curves; (5) wet/dry mix — blends processed and original signal. Mechanism of persistence: it persists as a DSP algorithm specified in signal-processing literature and software synthesizer architectures, implemented in audio plugins, embedded DSP chips, and digital effects chains, and taught as a standard technique for harmonic generation and timbral shaping. [formal: waveshaping | substrate: mind | horizon: a life | explicit: yes | epoch: 0.01]