apulSoft apShaper is an audio effect plugin to add harmonic distortion to audio signals. It combines a waveshaper with three filter bands and various modulation options - two LFOs, a dynamics detector, and user-configurable knobs.
apShaper can simulate various types of distortion, including tape and tube saturation, wavefolding and analog bitcrushing. apShaper uses sophisticated algorithms to reduce the big problem of digital distortion - unwanted nonharmonic noise. It performs analog waveshaping using numerical integration. The distortion is applied to a continuous model of the audio signal. This reduces digital artifacts more than traditional oversampling could, especially if the transfer curve is not smooth (wavefolding/bitcrushing).
The three filter bands offer the same great quality without frequency squeezing at high frequencies. The included variable slope low-pass filter type allows smooth slopes not possible by traditional filtering - ideal to gently shape signals with large amounts of distortion applied. Four types of tone control bands produce recreations of vintage and modern guitar/bass tones.