3d 17h 43m 45s

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RaPG is an analog-style arpeggiator that can be run at audio rate for a quirky sound generator or locked to a tempo to generate inspiring melodic and rhythmic phrases based on a seed-based random sample-and-hold.

Features Robin Schmidt's TriSaw morphable oscillator which can be morphed (not crossfaded!) into tri, saw, square, sine, anti-sine, and everything inbetween, giving tones that range from chiptune squares to warm analog saws.

Algorithmic Rhythms
Algorithmic Melodies
Morphable Oscillator
Master Rate Knob
updated on
November 3, 2018


"Rhythm And Pitch Generator’s synthesis engine is based around two main components – an analog-style arpeggiator and Robin Schmidt’s TriSaw morphable oscillator which is used to generate the sound on the output. The synthesizer also features an ADSR envelope with adjustable curves and velocity sensitivity, oversampling support, and a built-in preset manager.
Thanks to its ability to operate at audible rates, the arpeggiator can be used to generate a variety of quirky sound effects and blazingly fast sequences. The rate can be automated to create build-ups or slow-down effects, whereas the clock dividers can be set to various values while allowing the plugin to arrange them into a series of rhythms. Users who are more into conventional sequencing can sync Rhythm And Pitch Generator to host tempo and input notes manually or generate completely random melodies.
The oscillator is an equally exciting component of Rhythm And Pitch Generator, being capable of gradually morphing between triangle, saw, square, and sine waveforms. It is based on Robin Schmidt’s TriSaw morphable oscillator which provides true waveform morphing, as opposed to simply cross-fading between different waveform shapes. The oscillator section also features a low-pass filter, along with the phase, pitch, frequency, and pitch modulation controls."
- Tomislav Zlatic


Morphable Oscillators

Morphable oscillator which can be morphed (not crossfaded) into tri, saw, square, sine, anti-sine, and everything inbetween.

Clock Dividers

Set clock dividers to various desired beat patterns and let RaPG arrange them into a series of rhythms.

Master Rate

increase the arpeggiator to insane speeds or slow it down for dying-battery fx.

more features

Octave Offset Knob

Manually select notes in time allowing you to perform your arpeggio.

Up to 8x Oversampling

Increases accuracy of all processes.

Master Tempo Division

Tempo division of master clock triggers.

Modulatable Parameters

Anything to anything modulation capabilities.

"At the start the goal was create an arpeggiator that could be used and abused, ran at audio rate for sonic madness or offer musical and rhythmic inspiration to get a musical piece started quickly.

For the note selector I experimented with two chaotically interacting oscillators which offered interesting mayhem at audio rate,

but resulting melodies were too boring or random.

Also, it did not offer repeatable patterns with certain settings due to the digital nature of feedback computation (a problem to be solved in the future). Next I experimented with dual lorenz attractors, mixing the output for the note selector. This offered much better and repeatable melody lines but the number of controls were too much, and certain settings produced no output. I then moved to S&H noise which was simple, only requiring a seed knob. It offers random but repeatable results. Providing a variety note selector algorithms would be the best choice moving forward.

After experimenting with different note selection algorithms I realized that there was a lack of rhythmic variation. I remembered a long time ago one could create interesting rhythmic patterns by modulating clock dividers, but I couldn't remember the details. I looked at euclidian algorithms, clock modulating algorithms, and harmonic beat algorithms (setting beats to occur 1 2 3 4... speed of the base tempo). All were interesting but not quite what I wanted to offer. I then thought of a new brilliant idea. Have a number of clock dividers set to various intervals and crossfade between them randomly. This allowed for the most musical variation out of all the algorithms. Ghost clicks takes the step further by crossfading another clock simultaneously. Mix the results and trigger something. It would be interesting to combine all these ideas into one: modulatable-euclidian-crossfading-harmonic-beating clock divider! Yes, more experimentation is needed."

- Elan Hickler

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Captain's Log


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  • 64-bit: Windows 10, 8, 7 or Vista
  • 32-bit: Windows 10, 8, 7, Vista or XP
  • VST host
  • OS X 10.7 or higher
  • VST host
  • AU host
Press Kit

the press kit containing information along with high-quality images and logos of the plugin and Soundemote.



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