Masterpiece Generator MG emblem

Masterpiece Generator

Seed-driven groovebox for fast ideas

mgen.fun

Start with a sketch, finish with a masterpiece

No AI prompts, no sample packs. MG synthesizes drums, bass, and melodic slots internally, with randomization that stays musical, fresh, and controllable.

Open 1 min guide
algorithmic generation, not AI chaos + euclid rhythms internal synths, no samples hands-on sequencer deep synth tweaking song mode + pattern chaining one-button full song generation random FX + p-lock rand midi out + cc p-lock shipped slot rand + full-track rand render to WAV or MP3 pattern bank

Why MG feels like an instrument

Direct controls, synth-generated sound, and stable random that you can actually keep.

No AI, No Samples

No prompt-driven generation and no sample library dependency. Sound comes from the built-in synth engines.

Global + Per-Slot Random

Randomize pattern, sound, FX, and p-locks for the whole track, or target a single slot without destroying the rest.

Song Mode + Full Step Control

Build chained song structure with repeat-aware steps, then edit trigger, accent, slide, probability, note, and p-lock motion per step.

Random, sequencer and instrument set

Algorithmic random, full step sequencing, and deep synth control.

Random engine

  • Chaos and Euclid scales shape groove density and rhythm distribution
  • Independent random layers: Pattern, Instrument, FX, and P-lock
  • Every random layer supports global reroll and per-slot reroll
  • Multiple groove families plus dedicated bass and lead generation algorithms
  • No AI prompts and no sample packs, pure algorithmic track construction
  • Results stay musical, fresh, and non-repetitive

Sequencer

  • Pattern Bank with 99 pattern slots
  • Pattern length adjustable from 8 to 32 steps
  • Song Mode with pattern chaining and repeat-aware progression
  • Per-step trigger, slide, probability, accent, and note editing
  • MIDI Out with per-step CC p-lock lanes
  • Build and refine grooves step by step

Instrument set

  • Kicks, Snares, HiHats, Toms, Basses, Leads, Percussions
  • Randomize instrument sound independently from rhythm
  • Random FX for each slot and for the whole track in one action
  • Random p-lock motion with deterministic seed behavior
  • Route movement to external gear through MIDI Out + CC p-lock
  • Dedicated synth controls for each instrument
  • Sculpt tone manually from sketch to final mix

Random audio demos

Short sketches. Hit play and cycle through random exports.

Ready: demos loaded

Watch the workflow

Three raw screen captures of randomizing and editing one track flow. No genre labels.

Fast loop pipeline

1. Randomize Rhythm/Groove

Use seed + chaos to generate kick/snare/hat/bass movement and lock the groove direction.

2. Randomize Sound, FX, and P-Lock

Regenerate timbre, FX chain, and p-lock motion globally or only on the selected slot.

3. Generate, Edit, and Export Song

Generate a full song, edit arrangement and details, then export WAV, MP3, and MIDI for DAW workflow.

Buy License

Complete secure checkout, then fetch your key and activate inside the app.

Create checkout

Check order and key

Download

Native installers for all platforms. No subscription, no account required.

Development roadmap

What I am building next in Masterpiece Generator.

Shipped

Song Mode + Live Chaining

Pattern chaining, repeat-aware song steps, and playback-follow mode above the pattern bank.

Shipped

Random FX + P-Lock Layers

Random FX and random p-lock are first-class actions with both per-slot and full-track scope.

Shipped

MIDI Out + CC P-Lock

MIDI Out is available now, including per-step CC p-lock lanes for external hardware motion.

Planned

Sound and Workflow Polish

Improve voicing defaults, UI ergonomics, and faster end-to-end random-to-export iteration.

Planned

Per-Track Song Export + MIDI for DAW

Export full songs as per-track stems plus a standard MIDI file for fast arrangement in any DAW.

Planned

Song Random Generation Algorithms

Improve full-song random generation quality, section transitions, and repeatability under the same seed.

Planned

Android Version

Prepare a native Android release with touch-friendly workflow and mobile performance tuning.

Planned

Steam Deck Version

Ship a Steam Deck optimized build with controls and UI tuned for handheld usage.

FAQ

How long is the demo?

Demo period is 7 days, starting after first successful activation.

How many devices per license?

Current target policy is up to 3 devices per key.

Is MG subscription-based?

No subscription. MG is licensed directly, and random generation is not limited.

Is MG lightweight to run?

MG is a native desktop app written in Rust and optimized for low CPU and memory usage.

Who is behind MG?

Masterpiece Generator is built and maintained as an independent solo project.