OA-Labs

OA-Phosphor-1 Controllable instability

A free synthesizer for Mac (Windows coming soon), in AU and VST3. Unpredictable by design — and built to be played, not fought.

Get it free

VST3 · AU · macOS · Win (Coming Soon)

The OA-Phosphor-1 synthesizer interface

Presets

  • Aged Pad 0:00/0:00
  • Chord Cascade 0:00/0:00
  • Pluck Motion 0:00/0:00
  • Reese Bass 0:00/0:00
  • Arp 0:00/0:00

Feature showcases

  • Full demo Showing all elements working together in one track
    0:00/0:00
  • Aging Progressively adding age to hear the instability
    0:00/0:00
  • Chaos Pushing the chaos engine until it breaks
    0:00/0:00
  • Arp Groove Adding more groove to the arp over time
    0:00/0:00

Instability you can steer.
Every source of chaos has a leash.

Aging engine

Wear and drift applied to the signal. Push it and the instrument ages in real time — all of it under your hand.

Lorenz chaos

A strange attractor as a modulation source: deterministic motion that never quite repeats.

OA-Phosphor-1 instability module — AGE, character and chaos controls

Morphing filter

Not a static filter. Go past a plain sweep and morph continuously across filter types as you play.

OA-Phosphor-1 multimode morphing filter

Generative arp

Groove, glitch and per-step probability. An arpeggiator built for expression — not just up-down patterns.

OA-Phosphor-1 generative arpeggiator and step sequencer

Fold your source

Reshape the raw signal — warp, curve, fold and bias. Add feel and vibe, or rip it apart entirely.

OA-Phosphor-1 waveshaper module

Everything else

Sources

  • Two oscillators + dedicated sub
  • Cross, ring & hard-sync blend

Modulation

  • Dual LFOs — random, tempo-synced
  • Amp, filter & pitch envelopes

Filter & shaping

  • Multimode — LP / HP / BP / notch
  • Waveshaper — warp, curve, fold, bias
  • Up to 4× oversampling

Instability

  • Drift, jitter, wander & sag
  • Chaos rate & amount

Voicing

  • Poly, mono & legato
  • Unison with spread & phase
  • Glide / portamento

Format

  • Preset browser
  • AU & VST3 — Mac (Windows soon)

What’s next

  • Windows version
  • Effects section (reverb / delay)
  • MIDI sync
  • Arp steps that follow patterns, not just random variation
  • Expanded presets
  • Ongoing bug fixes

Planned, not promised.

Get it

Free. Yours to keep.

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OS
macOS
Format
AU / VST3
Size
18 MB