Casio CZ/ VZ/ FZ - Pro Series

This explanation is wrong because there's nothing as "phase angle of  
waveform". We can talk about phase of the waveform, or in the case of  
PM/PD instruments about the "phase angle of READING of the sine or  
cosine waveform from ROM".

It is this reading angle phase which is changed (= distorted), and has  
influence on the waveshape. Not the phase of the waveform itself.  
Human ears are quite insensitive to phase shifted signal, that can't  
be used for sound synthesis.

This is exact definition of Phase Distortion, or Phase Modulation.

So there's a big difference between this, and for example effect of  
comb filtering in phaser or flanger, where delayed signal (phase  
shifted) is mixed with the original signal.

Daniel Forro

On 15 Feb, 2014, at 9:15 AM, Lee wrote:
>
> Phase distortion is a matter of altering the phase angle of a  
> waveform.