Firefly Synth

A semi-modular CLAP and VST3 synthesizer and FX plugin. This is basically InfernalSynth's (https://www.kvraudio.com/product/infernalsynth-by-sjoerdvankreel) big brother.

See the github page https://github.com/sjoerdvankreel/firefly-synth/ for details, system requirements and downloads.

Manual/overview: https://github.com/sjoerdvankreel/firefly-synth/blob/main/manual.md.

Changelog: https://github.com/sjoerdvankreel/firefly-synth/blob/main/changelog.md.

Parameter reference: https://htmlpreview.github.io/?https://github.com/sjoerdvankreel/firefly-synth/blob/main/param_reference.html.

Features:

• Theming support.
• Global unison
  • Stereo spread + voice detune.
  • LFO and oscillator phase offset.
  • LFO and envelope "detuning".
• 5 oscillators
  • Noise generator.
  • Karplus-strong generator with 2 modes.
  • Sine + bandlimited saw / triangle / square + pwm.
  • Bandlimited DSF (Discrete Summation Formulae): this is basically a limited additive generator, see https://www.verklagekasper.de/synths/dsfsynthesis/dsfsynthesis.html
  • Hard-sync, unison, AM and FM support.
• 10 per-voice and 10 global effect modules
  • Resonant state variable filter with low/high/band/allpass, notch, peaking eq, low/high shelving and bell filters.
  • Comb filter with feed-forward and feed-back gain.
  • Distortion module with waveshaper, resonant LPF and before-and-after shape skewing parameters, hard clip and a couple of soft clipping / saturation functions.
  • (Global only) reverb module, feedback delay and multi-tap delay.
• 10 per-voice and 10 global LFO's
  • Optional bpm-sync and one-shot modes.
  • Smooth noise, static noise, free-running static noise and various periodic waveforms.
  • Horizontal and vertical skewing parameters.
  • Phase adjustment, stair-stepping and smoothing parameter.
• 10 per-voice DAHDSR envelopes
  • Linear and 3 exponential modes.
  • Optional bpm-sync and smoothing parameter.
  • Attack/decay/release slope control.
  • Regular legato + retrigger/multitrigger options for monophonic mode.
• Master CV module
  • MIDI/BPM smoothing controls.
  • 5 freely-assignable aux parameters to be used through the mod matrices.
  • MIDI-linked pitchbend and modwheel (these are bound to external MIDI).
• Voice input module
  • Poly/monophonic mode.
  • Portamento mode with optional bpm-sync.
• Routing matrices
  • Osc-to-osc amplitude-modulation and frequency-modulation.
  • Per-voice and global audio routing between osc/voice-mixdown/fx/master-out.
  • Per-voice and global cv-to-audio matrices (envelopes/lfos/master cv/midi/note events to osc and fx parameters and audio-to-audio matrix parameters).
  • Per-voice and global cv-to-cv matrices (midi/master cv/envelope/LFO to envelope/LFO and cv-to-audio matrix).
  • For per-voice modulation, on-note versions of all global CV sources.