vibetune

A lightweight terminal music generator that uses local LLMs (via Ollama) as the creative brain to produce MIDI background music for videos.

Features

• LLM-driven composition: Ollama translates a vibe description into a full music spec (key, tempo, chords, instruments)
• Built-in player: Play, pause, and stop without leaving the terminal
• Trim & crop: Cut clips to any length
• Loop-friendly export: Crossfade-loop a clip seamlessly for video backgrounds
• Presets: Save favorite vibes and reuse them
• Variations: Generate riffs on a track you liked
• Save/discard: Audition before committing

Installation

1. Install prerequisites

Ollama — runs the local LLM (ollama.com):

ollama pull qwen3.5:4b

FluidSynth — MIDI synthesis (vibetune will remind you if it's missing):

# macOS
brew install fluidsynth

# Ubuntu/Debian
sudo apt install fluidsynth fluid-soundfont-gm

2. Install vibetune

pip install vibetune

3. Run

vibetune

Usage

Generating a track

Describe any vibe and vibetune composes a MIDI track via the local LLM:

vibetune> gen lofi study beat, rainy afternoon, jazzy chords
vibetune> gen upbeat 8-bit adventure theme, fast tempo
vibetune> gen dark ambient drone, cinematic, building tension

Auditioning and editing

vibetune> play               # play the current track
vibetune> pause              # pause
vibetune> resume             # resume
vibetune> stop               # stop playback

vibetune> trim 0 30          # cut to the first 30 seconds
vibetune> trim 0:10 0:45     # also accepts mm:ss format
vibetune> loop               # crossfade the end into the start for seamless looping
vibetune> loop 2.5           # longer crossfade (seconds)
vibetune> undo               # revert the last edit

vibetune> info               # show key, tempo, instruments, chord progression

Saving

vibetune> save               # save with an auto-generated name
vibetune> save my_track      # save with a custom name
vibetune> library            # list all saved tracks
vibetune> discard            # throw away the current track without saving

Variations

Generate a new track with the same vibe but different chords, tempo, and instruments:

vibetune> vary

Presets

Save a vibe you like and reuse it later:

vibetune> preset save              # interactive: pick current vibe or enter a new one
vibetune> preset list              # show all saved presets
vibetune> preset use lofi-study    # generate a track from a preset
vibetune> preset edit lofi-study   # edit the preset's name or vibe inline
vibetune> preset delete lofi-study # remove a preset

Other

vibetune> duration 60        # set default track length to 60 seconds
vibetune> model qwen3.5:9b   # switch to a different Ollama model
vibetune> help               # full command reference
vibetune> quit

Configuration