Music prompt
Describe a track in French: style, mood, instruments, tempo, key, constraints and duration. BotSong builds an editable multitrack arrangement.
From idea to multitrack song
Compose. Arrange. Export.
BotSong turns a music description and your inspiration MIDI files into a complete project you can structure, reharmonize, mix, audition and convert to MIDI or karaoke.
Monthly subscription4,99 € / moisor lifetime purchase: €29.99
Create everything for free. Projects, size, duration, editing, playback and saving are unrestricted. Without an active paid option, only exported .mid and .kar files are truncated to 15 seconds. The auto-renewing €4.99 monthly subscription or the €29.99 one-time lifetime purchase removes this limit.
Complete studio
Everything BotSong can do
Every stage stays editable: generation, structure, notes, harmony, lyrics, mixing, projects and exports.
Multitrack composition
Generate piano, bass, drums, percussion, pads, synths, guitars, strings, brass, woodwinds, lead melodies and counter-lines based on the requested style.
Styles and harmony
Use many genres, major, minor and modal keys, cadences, extended chords, inversions, modulations, time signatures and local musical changes.
Inspiration MIDI
Import one or several MIDI files as a corpus. Adjust their weights, choose strict or free interpretation and preserve key, tempo, chords, added melodies or lyrics.
Song structure
Arrange intros, verses, choruses, bridges and custom sections. Edit the chord grid, subdivisions, repetitions and measure durations.
Detailed arrangement
See every track on a timeline, edit notes and velocities in the piano roll, add melodies, reharmonize and control global or local instrumental density.
Mixing and playback
Solo, mute and change track volume, balance vocals and backing, play through a General MIDI SoundFont, seek precisely and render WAV previews.
Lyrics and karaoke
Enter lyrics by section, split syllables across notes, force a word onto one note, align the vocal melody and use full-screen karaoke with a countdown.
Professional exports
Export multitrack Standard MIDI .mid, synchronized-lyrics karaoke .kar, WAV audio and JSON song-structure/chord-grid files.
Project library
Create, name, save, reopen and export .botsong projects. Autosave and last-project restoration keep your work safe.
Safe editing
Undo/Redo history, preserved playhead position while editing and transformation tools that avoid destroying the source project.
On-device workflow
Algorithmic composition, editing, MIDI rendering and project management happen on the device. No BotSong account is required.
Two options for full exports
Choose the auto-renewing €4.99 monthly subscription, cancellable from your store account, or the €29.99 non-consumable lifetime purchase. Both options unlock full MID and KAR exports on the relevant platform. Restore Purchases recovers an active entitlement with the same account and store.