Tanh[3] by Instruo is a three-channel waveshaper, limiter and overdrive effect with independent channels. Technically, each channel performs a soft clipping with the audio signal. Since different input levels also have an effect on the result, this is clearly a matter of trial and error. The results that can be elicited from a Tanh[3] channel vary between waveshaping, slight waveform modification, soft clipping and distortion. It gets really exciting when you wire two or all three channels together in series; not much of the original signal is left, but that's what makes distortion the most fun.