hieroglyphic-plume

Hieroglyphic Plume

18 HP Eurorack module

Plume is a pulsar synthesizer with waveform shaping, formant and clustering controls, masking, window modulation, pitch control, and L/R outputs.

Features

  • Continuously variable pulsar clustering.
  • Seven-shape waveform morphing with wavefolding.
  • Burst and stochastic pulsar masking.
  • Window-based amplitude contour modulation.
  • Stereo or dual-mono output operation determined by masking mode.

Controls & Jacks (27)

  • Shape— Smoothly morphs among seven waveshapes: sine, up ramp, triangle, down ramp, square, noisy square, and white noise.
  • Window Type— Smoothly morphs among seven amplitude-contour shapes for window modulation.
  • Fine Tune— Fine-tunes fundamental frequency by +/-6 semitones around the centre position.
  • Formant CV Input— CV input summed with the Formant slider; accepts -7 V to +7 V.
  • Cluster CV Input— CV input summed with the Cluster slider; accepts -7 V to +7 V.
  • Rest / Pan— In Burst mode, determines the number of pulsars removed from the burst-ratio loop, from 0 to 6.
  • Burst / Probability CV Input— CV input summed with the Burst / Probability slider; accepts -7 V to +7 V.
  • Rest / Pan CV Input— CV input summed with the Rest / Pan slider; accepts -7 V to +7 V.
  • Left Signal Indicator— Bicolour L-output signal monitor: green indicates positive voltage, red negative voltage, and audio-rate signals appear orange.
  • Window Amount— Sets how strongly window modulation affects each pulsar, or pulsar groups when Cluster exceeds one.
  • Fold CV Input— CV input summed with the Fold slider; accepts -7 V to +7 V.
  • Cluster— Sets the continuously variable number of single-cycle waves in each pulsar, from 1 to 7.
  • Shape CV Input— CV input summed with the Shape slider; accepts -7 V to +7 V.
  • Mask— Press to switch between Stochastic and Burst masking modes.
  • R Output— Audio output carrying rest pulsars in Burst mode, or the right channel in Stochastic mode.
  • Fold— Adds West-Coast-style wavefolding to the pulsar waveshape.
  • Formant— Sets formant frequency relative to the fundamental frequency in coupled mode.
  • L Output— Audio output carrying burst pulsars in Burst mode, or the left channel in Stochastic mode.
  • Window Type CV Input— CV input summed with the Window Type slider; accepts -7 V to +7 V.
  • Sync Input— Hard-sync input that resets the output waveshape on rising edges above 2.5 V.
  • Window Amount CV Input— CV input summed with the Window Amount slider; accepts -7 V to +7 V.
  • V/Oct Input— One-volt-per-octave pitch CV input; remains active when frequency is locked.
  • Burst / Probability— In Burst mode, determines the number of pulsars present in the burst-ratio loop, from 1 to 7.
  • Right Signal Indicator— Bicolour R-output signal monitor: green indicates positive voltage, red negative voltage, and audio-rate signals appear orange.
  • Range— Press to switch between HI and LO frequency ranges.
  • Coarse Tune— Sets the fundamental frequency over a 10-octave range: 10 Hz to 10 kHz in HI mode or 0.5 Hz to 50 Hz in LO mode.
  • OLED Display— Shows frequency range, fundamental frequency, masking mode, window shape, and the output waveform.

How-To Guides

  • Calibrate the V/Oct Input

Explore the interactive Plume panel on BleepDex — tap any control to learn what it does.

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