Casio CZ/ VZ/ FZ - Pro Series

Sean,

I am looking at page 13 of the 101 manual which explains PD. Fig 1 shows a standard sine and the commensurate phase angle as an increasing straight line above it. As the text explains,the sine is being read LINEARLY - and therefore the sine wave results. Read as in Fig2 or 3 the phase angle is warped (modulated) by the function at the top of the figures,resulting in a sine become near saw in Fig 2 and a saw wave in Fig3. 
The DCW acts like a conventional analog filter in that it is that which alters the phase angle of the DCO. So the example Figures in the manual using sine wave are to demonstrate the principle. The modulating function (marked 0 to 2pi) is how the DCW modules the DCO phase angle to change harmonics. The DCA of course modulates the AM for (8stage) ADSR volume envelope. There is also of course pitch enveloping which alters the pitch during duration of the note.
" a sine wave is being distorted by a bent sawtooth" - the sine wave is a demo signal and the 'bent saw' is the control to the phase angle.

"the wave produced by the DCO is used to distort a sine wave, and this distorted sine wave is the final product " -  I think it is that the control function alters the phase angle of the DCO, thence if no control function (modulation) of the phase angle is applies,then the DCO will be the wave at the output.

The DCO can combine certain waveforms to cause a more complex one before the phase angle is altered.

That is my understanding - but I confess I found the manual a tad confusing on this score the first time I looked at it.
I believe the above is correct,unless anyone has anything else to add/correct?

Lee


      From: "Sean Luke sean@... [CZsynth]" <CZsynth@yahoogroups.com>
 To: CZsynth@yahoogroups.com 
 Sent: Wednesday, 12 September 2018, 2:42
 Subject: [CZsynth] Questions about Phase Distortion
   
    I am pretty confused about PD.  Can anyone help me here?
1. PD seems to have two different descriptions.  One is the description that appears in the Casio series manuals, where a sine wave is being distorted by a bent sawtooth.  The other is a figure which comes from the PD patent: you can see the figure here https://en.wikipedia.org/wiki/Phase_distortion_synthesis   Note that the sine is being both distorted and then amplitude-modulated.  Can anyone tell me which of the two is correct for the CZ series?  If it's the example in the manual, a sawtooth is easy, but how does one "bend" other DCO Waves so as to distort a sine?  Or does a plain sawtooth get morphed into the DCO wave in question so as to distort the sine?
2. I am confused by the sound output being displayed on various websites, such as http://www.kasploosh.com/projects/CZ/11800-spelunking/7-window-unique.html  My understanding is that the wave produced by the DCO is used to distort a sine wave, and this distorted sine wave is the final product (ignoring the DCA) sent to line out.  Furthermore, the manual suggests that at one end of the DCW modulation we have a pure sine wave and at the other end we have the distorted sine.  However these websites suggest that the DCO wave can be viewed directly at line out.  What am I seeing here?  Is this the DCO wave?  Is it the distorted sine wave which for some reason resembles the DCO wave?  Etc.
Sean  #yiv8401297122 #yiv8401297122 -- #yiv8401297122ygrp-mkp {border:1px solid #d8d8d8;font-family:Arial;margin:10px 0;padding:0 10px;}#yiv8401297122 #yiv8401297122ygrp-mkp hr {border:1px solid #d8d8d8;}#yiv8401297122 #yiv8401297122ygrp-mkp #yiv8401297122hd {color:#628c2a;font-size:85%;font-weight:700;line-height:122%;margin:10px 0;}#yiv8401297122 #yiv8401297122ygrp-mkp #yiv8401297122ads {margin-bottom:10px;}#yiv8401297122 #yiv8401297122ygrp-mkp .yiv8401297122ad {padding:0 0;}#yiv8401297122 #yiv8401297122ygrp-mkp .yiv8401297122ad p {margin:0;}#yiv8401297122 #yiv8401297122ygrp-mkp .yiv8401297122ad a {color:#0000ff;text-decoration:none;}#yiv8401297122 #yiv8401297122ygrp-sponsor #yiv8401297122ygrp-lc {font-family:Arial;}#yiv8401297122 #yiv8401297122ygrp-sponsor #yiv8401297122ygrp-lc #yiv8401297122hd {margin:10px 0px;font-weight:700;font-size:78%;line-height:122%;}#yiv8401297122 #yiv8401297122ygrp-sponsor #yiv8401297122ygrp-lc .yiv8401297122ad {margin-bottom:10px;padding:0 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