The method known as phase distortion synthesis is similar to FM.

Casio made five different synthesizers using this method of phase distortion synthesis.

Phase distortion synthesis is a method implemented on Casio CZ synthesizers.

It uses the Phase distortion synthesis related to all other Casio CZ synthesizers models.

Casio developed a related form of synthesis called phase distortion synthesis, used in its CZ range of synthesizers.

Casio VZ series utilize Interactive Phase Distortion synthesis (iPD synthesis).

In turning to SD synthesis Casio meant to create a synthesis engine that was more comprehensible and accessible than Phase Distortion synthesis.

In this capacity, it was described by Casio in the CZ-1's manual as being phase distortion synthesis's equivalent of the VCF (voltage-controlled filter) in analogue synthesisers.

Harmonic Additive synthesis models sounds directly from pure sine waves, somewhat in the manner of an organ, while Frequency modulation and Phase distortion synthesis use one oscillator to modulate another.

Among the most popular waveform synthesis techniques are subtractive synthesis, additive synthesis, wavetable synthesis, frequency modulation synthesis, phase distortion synthesis, physical modeling synthesis and sample-based synthesis.

The later, more professional range of keyboards, the CZ series, used phase distortion synthesis, which is mathematically almost identical to Yamaha's frequency modulation synthesis, although implemented slightly differently to avoid patent infringement.

The different synthesis methods employed by MMT represent the majority of methods used historically in other Korg synthesizers: digital waveguide synthesis was first used in the Korg DW-8000 and phase distortion synthesis was first used in the Korg DS-8.

The RADIAS' MMT (Multiple Modelling Technology) engine was based on the Korg OASYS synthesizer module, providing for several different synthesis methods, two of which may be combined in a single voice e.g. phase distortion synthesis can be combined with subtractive synthesis.