The Instruotanh[3]is a three channel waveshaper; limiter; overdrive; and feedback controller.
Each channel of thetanh[3]takes a signal input and outputs the hyperbolic tangent function (tanh (x)) for that input signal.
… In more musical terms; tangential distortion is a form of soft clipping which can produce signal amplitude limiting via analogue waveshaping. Driving a hot audio signal into it will add warm overdrive.
Raw waveforms will be subtly shaped softening or adding harmonic content based on input amplitude.