P'PD and S'PD and D'PD

phase-distortion synthesizers

(14 Votes)
1.1 (Updated 2 years ago)
October 17, 2017
Reaktor 5 or lower


There are three ensembles in this upload. P'PD, S'PD and D'PD are phase-distortion synthesizers employing the phase-distortion oscillator (core) of Benjamin Poddig which is modeled on the oscillator of the CZ5000 Cosmosynth from Casio. S'PD is somewhat similar to a one-oscillator Casio CZ, but none of the three ensembles is an emulation of a Casio CZ5000.

In S'PD there are three separate Multi-BP envelopes: one to modulate the phase-distortion, one to modulate the pitch, and one to modulate the amp output. I also added an optional low-note-retrigger mode (LNR).

D'PD is S'PD with an added oscillator (DCW). In D'PD both oscillators share the same Multi-BP envelopes.

In P'PD the amplifiers are controlled using AHDSR envelopes; the amount of phase-distortion (and/or the pitch) is modulated with a single multi-breakpoint envelope, one for each oscillator.

The knobs are from Carbon 2.

Made with Reaktor 5.6.2

v1.1 - added the D'PD ensemble to the upload


John Bleech
1 year ago
For D'PD and S'PD the "HiCUT 1" and "HiCut 2" knobs apply to the Left and Right channels respectively (not Osc 1 and Osc 2 as the hints indicate). For P'PD those knobs are for Osc 1 and Osc 2 when both oscillators are on; when only one oscillator is on those knobs apply to the left and right channels.
John Bleech
2 years ago
I've been fooling some more with the bipolar envelope and indeed I can get sounds that I can't quite duplicate with the unipolar envelope when the PD knob on the Poddig DCW is not at the minimum or maximum setting. Anyway, I'll soon be uploading a third synth (D'PD) to round out the set. It will have a bipolar option for the Multi-BP Envelope which modulates the DCW's.
John Bleech
2 years ago
Paule, thanks for your suggestion; a good tip to remember. I just now tried it and was easily able to change from a unipolar envelope to bipolar envelope with the addition of a single button-press. In actuality, as far the phase-distortion goes, the same sound can be achieved using either the unipolar or the bipolar envelope. In the bipolar envelope breakpoints below the x-axis are mirror images of the breakpoints above the x-axis (with respect to the PD oscillator). However, when there are breakpoints close to one another, using the bipolar envelope does makes things visibly clearer and easier to edit. Had I known this trick when I built the synth, I may have incorporated it.
2 years ago
P'PD uni/bi polar John, there are some more interesting sounds if you use the bipolar function on MBP envelope. Please follow in the struction. Create a button on selectors pos and set the macro to visible: P'PD > OSC1 > Multi-BP Env > GUI > Graph Display > Uni-Bipolar It's an unfinished macro. The written bipo output walks through some macros an end with RTY in disconnect inputs at Draw Frame.
2 years ago
Thank you. Working now on some ph.mod thoughts, very handy and in time :))
Philippe Loiseau
2 years ago
Listened to the PPD, some very nice sounds, good work ! Next S'PD...