[sdiy] as3340 PW/tuning issue

[David G Dixon]

The Intellijel Rubicon (and Rubicon-2) gives the option of generating pulse
waves from Triangle, Saw, or Double-Saw (twice the frequency).  It's not a
whole synth, just a TZFM VCO.

 

  _____  

From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of
Mattias Rickardsson
Sent: Friday, January 03, 2020 6:57 AM
To: Richie Burnett
Cc: Brian Willoughby; Synth DIY
Subject: Re: [sdiy] as3340 PW/tuning issue

 

On Fri, 3 Jan 2020 at 10:31, Richie Burnett <rburnett at richieburnett.co.uk>
wrote:


... The faster the rate of change of the LFO waveform the greater the pitch
modulation. Try whacking LFO speed up and listen to the seasick pitch warble
on most synths with pwm!

However, pwm generated from a triangle waveform source results in both edges
of the pulse waveform being modulated equally and in opposite directions.
Therefore the centroid of the pulses doesn't move and there is no resulting
pitch modulation. That's one of the advantages of using a triangle wave
instead of sawtooth to generate PWM waveforms. 

 

I'd say this chorus-y pitch warble is often a desired and/or useful feature
of the PWM setting for many people.

Is any commercial synth known for using the triangle wave to create the
pulse wave without warble?

 

/mr

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