This is an instrument heavily based on the Moog Subharmonicon, rebuilt for A4 after my older A3 version.
In short, it takes a fast clock and divides it 4 times by integers between 1-16 to create 4 slower clocks. These can be combined to generate polyrhythms. The combined clocks drive 2x4-step sequencers which go to two sets of oscillators. Each set contains a primary oscillator and 2 sub oscillators, which divide the pitch of the primary by integers between 1-16, producing interesting chords based on subharmonic intervals. Mixers, filters, VCAs and reverbs follow.
For more information on the polyrhythm and subharmony aspects, refer to the literature on the hardware.
- Expanded Quantizer with ability to change root note, scale, and optionally tune the subs.
- Expanded sequencer functionality (1-4 steps, forward reverse probability, modulation for each step).
- Independent filter and amp sections for oscillator 1 and 2 (with ability to link controls).
- Stereo width for oscillator 1 and 2.
- Ability to decouple the gates from sequencer 1 and 2.
- PWM setting replaced with a different oscillator shape (I wasn’t enjoying the PWM setting).
- PWM input in the patch be replaced with oscillator sync (as I haven’t figured out how to PWM my splined square wave yet).
- Patch Bay removed in favor of locating the I/O throughout the UI next to their source elements.
- Gate logic (OR/XOR) modes (implemented in midi on hardware).
- Reverb (uses a lot of CPU so turn the mix knobs off to spigot if not required).
See in patch
|4.0||Polyrhythmic_Subharmony_Generator_4.0.audulus4 (531.9 KB)||12/1/2023||Initial release|
|4.1||Polyrhythmic Subharmony Generator 4.1.audulus4 (532.6 KB)||14/1/2023||Added external clock input|
Open the patch and press Run. Turn on Osc2 Drone and add some reverb mix!