Melody Generator & MIDI Maker.

How to generate and export a melody

1. Set the musical grid. Choose a key, scale, tempo, time signature, bar count, rhythm division and pitch range.
2. Shape the generator. Set note density, contour, repetition, rest chance and a seed, then select Generate melody.
3. Edit and preview. Change pitch, rest state, velocity or duration in the step list. Use Play for the simple local synth reference; Stop or Escape cancels even a preparing audition.
4. Export the sequence. Download a Standard MIDI File format 0, exact-frame WAV, locally encoded MP3 or JSON receipt from the visible sequence.

From the visible notes to a controlled audition and file

Preparing is not playing. Play renders the current melodic sketch when needed and asks the browser to enable audio. Stop is available during that preparation as well as playback. A cancelled start cannot play later, and returning to the page never restarts the audition automatically.

Use the right cancellation. Stop ends the audition without changing your notes; a useful render may still finish. Cancel render discards partial PCM. Escape cancels the audition, any unfinished render and a pending audio download. If playback fails, the editable melody stays available; press Play to retry after allowing browser audio.

Edits belong to the next file. Changing settings, Generate, Mutate and step edits retire a pending old WAV/MP3 download. MIDI stores notes, timing and velocity for your own instrument. WAV stores the current simple stereo synth at 48 kHz with exact musical frame duration; locally encoded MP3 uses the same PCM but may include codec padding. JSON preserves the seed, mutation and event receipt rather than an instrumental sound.

A melody sketcher, not an AI songwriter

This generator applies conventional musical rules to a seeded random stream. Scale membership limits the available pitches, contour supplies a broad direction, and the rhythm, density, repetition and rest controls decide how the step grid is populated. A seed makes the result reproducible; it does not prove originality.

The synthesized preview is intentionally plain. It lets you check notes and rhythm before assigning an instrument in a DAW. All generation, edits and exports run locally in the browser. MP3 uses a same-origin local encoder and can contain normal codec padding; WAV has the exact calculated frame count.

Melody Generator vs chord and audio analysis tools

Melody Generator

Creates one note at a time from selected scale, grid and seed rules. Use it to sketch a lead, hook or practice line.

Chord Progression Generator

Creates simultaneous notes as named chords and harmonic progressions. It is for harmony, not monophonic lead lines.

Audio to MIDI

Analyzes an existing input recording to estimate notes. This melody generator does not listen to a file or infer a performance.

Export timing and safety limits

MIDI is written as Standard MIDI File format 0 on a 480 PPQ grid. Tempo, 4/4 or 3/4 time signature, note velocity and edited durations come from the visible sequence. WAV rendering uses exactly 48,000 sample frames per second for the full bar duration, including trailing rests. JSON preserves the settings, mutation number and every visible step for an auditable receipt.

Bounds: 1–16 bars, quarter/eighth/sixteenth grids, at most 256 visible steps, at most 256 note events and a maximum exact render of 4,608,000 stereo frames. Cancelling a render discards partial audio. Changing a generation setting marks the current result stale until it is regenerated.

FAQ

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