Eurorack Reference / modules /bastl-instruments/pizza audit site v0.1 — milestone 3
bastl-instruments/pizza

Pizza

Bastl Instruments

Digital FM oscillator with 3 internal oscillators (MAIN carrier, OCT and RATIO modulators), wave-folding, ring modulation, and assignable CTRL.195

Capabilities 2

2-Operator FM Synthesisfm-synthesis
MAIN oscillator is the FM carrier; OCT and RATIO oscillators are modulators. FM INDEX crossfader controls modulation depth and source selection.195
Voltage-Controlled Oscillatorvco
Three internal oscillators (MAIN, OCT, RATIO) with V/OCT input, octave transposition, detune, and fine-tune modes.195

Jacks 9 — 6 in / 3 out

NameSignalVoltageDescription
Inputs (6)
CTRL CVcv-6V to 6VCV input for the assignable CTRL knob; when plugged, CTRL knob acts as an attenuverter for this CV.195
EXTaudio-6V to 6VExternal audio input that replaces the OCT oscillator as the FM modulator when a cable is plugged in.195
FM INDEX CVcv-6V to 6V195
SHAPE CVcv-6V to 6V195
SYNCgate-6V to 6VResets the phases of all oscillators for hard sync; also triggers the built-in AD envelope in Envelope VCA mode.195
V/OCTcv-5V to 8VExternal V/OCT pitch control with calibration and optional quantization.195
Outputs (3)
MAIN OUTaudio-5V to 5VMAIN oscillator output after FM modulation, wave-folding, and ring modulation; affected by bipolar VCA when assigned.195
OCT OSC OUTaudio-5V to 5VOCT oscillator output after WAVE-shaping; usable as sub-oscillator or to reinforce the fundamental. Affected by bipolar VCA when assigned.195
PULSEaudio-5V to 5VPulse output of the MAIN oscillator taken before FM modulation (pulse width modulated by FM INDEX), or optionally the RATIO oscillator output via boot-time toggle.195

Parameters 14

NameTypeRangeBehavior
CTRL knobknobAssignable control; serves as static knob without CV or as attenuverter when CV is patched. Destinations include: OCT OSC WAVE, MAIN WAVE FOLD, OUTPUT VCA, MAIN RING MOD, Octave, OCT OSC Ratio, OCT OSC Exp FM, RATIO OSC Exp FM, FM INDEX modulation, second FM INDEX modulation, Waveshape, Folding, Ring Modulation, Bipolar VCA, Envelope VCA mode.195
FM INDEXfaderCenter position = no FM. Moving left applies RATIO oscillator modulation; moving right applies OCT oscillator modulation. Pulse width of PULSE output is also modulated by FM INDEX position.195
INDEX MODknobAttenuverter for the FM INDEX CV input. Right = positive modulation (as if moving FM INDEX fader right); left = inverted modulation (as if pushing FM INDEX fader left).195
OCT OSC buttonbuttonSelects one of 4 octave intervals for the OCT oscillator relative to the MAIN carrier.195
OCTAVE mode (PITCH)menu_setting-4octave – 4octave195
PITCH buttonbuttonSingle press switches between OCTAVE and DETUNE modes. Long press enters TUNE mode (semitone/fine-tune). Hold 6 seconds for Coarse Pitch mode. Long press again to return to normal.195
PITCH knobknobIn OCTAVE mode: adjusts octave (+/-4 octaves). In DETUNE mode: detunes OCT and RATIO OSC from MAIN (right=exponential, left=linear Hz). In TUNE mode: adjusts semitone transposition (+/-12 semitones) or fine-tune (+/-120 cents). In Coarse Pitch mode: sets pitch freely across a wide frequency range.195
RATIO OSC buttonbuttonSelects one of 4 user-settable frequency ratios for the RATIO oscillator. Long press enters RATIO SETTING mode to edit each ratio (numerator 1-16, denominator 1-16).195
RATIO denominatormenu_setting1 – 16195
RATIO numeratormenu_setting1 – 16195
SHAPE buttonbuttonSelects SHAPE section mode: WAVE (morphs modulator waveforms square-sine-saw), FOLD (two wave-folding algorithms on MAIN), or RING (ring modulation between MAIN and OCT/RATIO). Long press enters CTRL assignment mode.195
SHAPE faderfaderCenter = neutral (no shaping). Left/right sides activate different shaping modes depending on which SHAPE mode (WAVE, FOLD, RING) is active via the SHAPE button.195
TUNE finemenu_setting-120cent – 120cent195
TUNE semitonemenu_setting-12semitone – 12semitone195

Firmware history 2 versions

VersionReleasedNotes
1.12195
1.1195

References 2

  1. [195]
    Bastl Pizza FM & Wave-Shape Oscillator Manual (firmware 1.1)manual
    verified 2026-05-06
  2. [196]
    Bastl Pizza product pageproduct_page
    ⚠ verified 2026-05-06 · manufacturer changed since last verified