A drum synthesizer and probability-driven sequencer for producers who want fast sound design, evolving grooves, and genuinely surprising results.
The real Probabil FM demo shows the instrument, the sequencer, and the workflow inside a DAW. No mystery box — open the instrument and see the signal move.
Open full demoProbabil FM is built around two controls that make the sound behave like a performance: a retrigger lane that draws the roll, and a second synth layer that gives each part another voice.
Retrigger Line turns one step into a playable roll with its own length, hit count, timing curve, and velocity ramp. It is the fastest way to make a fill accelerate into the next bar or decay away from it.
Switch on the second stereo layer and turn a single part into a wider, thicker instrument. Edit the left and right voices independently, spread them with WIDE, or use ALT to generate a fresh variation without losing the groove.
Probabil FM turns FM synthesis into a playful path from a single sound to a groove that keeps changing under your hands.
Build punchy kicks, snares, hats, and percussion with a fast 3-operator FM engine.
Use probability, division, humanize, automation, and the Retrigger Line to create grooves that keep evolving.
Watch the real demo and follow the synth, sequencer, and DAW workflow from sound to pattern.
Eight independent parts, three-operator FM voices, a dedicated noise source, a second stereo layer, and per-instrument effects for punchy percussion.
Set probability and division per step, then use humanize, automation, and Retrigger Line rolls to keep every pass alive.
Send MIDI, record stereo or individual tracks, and render WAV or AIFF stems at 44.1, 48, or 96 kHz.
From the first FM transient to the final stem, the interface keeps sound design, sequencing, storage, and export in one focused instrument.
Every part is built from Carrier, Mod 1, Mod 2, and a dedicated noise source. Ratios, feedback, envelopes, and slopes stay live and automatable.
Give every step its own chance and subdivision count, then add humanise, independent track lengths, and automation for grooves that do not loop the same way twice.
Store individual part sounds, build kits, save patterns, and keep up to 16 complete arrangement snapshots ready to recall.
Every part has its own effects chain, while the export page renders a full mix or aligned stems in WAV or AIFF at 44.1, 48, or 96 kHz.
Version 1.5.0 is available as a .deb package (recommended for the supported distributions) or a .tar.gz archive with an installer script.
Download Probabil FM for LinuxProbabil FM — audio plugin for Apple Silicon Mac, Windows, and Linux. One-time payment.