Exploring Synthesis (3): Phase Distortion Synthesis

The Music Telegraph | Text 2024/09/06 [15:38]

Exploring Synthesis (3): Phase Distortion Synthesis

The Music Telegraph| 입력 : 2024/09/06 [15:38]

 

▲ Casio CZ Wave Forms (CZ-1)

© Wikimedia Commons



Exploring Synthesis (3): Phase Distortion Synthesis

 

Phase Distortion Synthesis (PDS) is a method introduced by Casio in their digital synthesizers (CZ series synthesizers) released in 1984, combining the characteristics of FM synthesis with subtractive synthesis. Although this synthesis method is fundamentally different from FM, it was devised to compete with Yamaha's FM synthesis, which was largely popular at the time. PDS is easy to understand if you grasp the concept of the phase of regular waves, such as sine waves. When a sine wave first reaches its highest point, this can be considered 90 degrees, and when it returns to zero, it has reached 180 degrees. When it reaches the lowest point, it is at 270 degrees, and upon returning to zero again, it completes a full cycle at 360 degrees. The distance between each phase is constant. However, PDS alters the fixed time it takes to traverse these intervals, making each phase section irregular.

  

  

▲ Casio CZ-101

© Wikimedia Commons



 

GroovyDSP: Introduction to Phase Distortion Synthesis 

 

 

 

 

 

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