{ "slug": "midi-chord-progression-generator", "name": "gizza-ai/midi-chord-progression-generator", "version": "0.1.0", "title": "MIDI Chord Progression Generator — gizza.ai", "description": "Convert chord symbols like C G Am F into a downloadable .mid file with voicing, inversion, arpeggio, strum, tempo and instrument controls.", "tags": [ "chord progression to midi", "midi chord generator", "chord symbols", "music theory", "midi file generator", "arpeggio generator" ], "category": "audio", "urls": { "page": "https://gizza.ai/tools/midi-chord-progression-generator/", "markdown": "https://gizza.ai/tools/midi-chord-progression-generator/index.md", "descriptor": "https://gizza.ai/tools/midi-chord-progression-generator/tool.json", "deep_link_example": "https://gizza.ai/tools/midi-chord-progression-generator/?progression=C%20G%20Am%20F%0ACmaj7%20%7C%20Dm7%20G7%20%7C%20Cmaj7&tempo=120&beats_per_chord=4&beats_per_bar=4&octave=4&voicing=close&inversion=root&pattern=block&arp_note=eighth¬e_length=95&add_bass=true&transpose=0&velocity=96&instrument=acoustic-grand-piano" }, "cli": "gizza tool midi-chord-progression-generator \"C G Am F\nCmaj7 | Dm7 G7 | Cmaj7\"", "tool": { "description": "Convert a chord-symbol progression into a Standard MIDI File (.mid) with voiced chords and timing. `progression` accepts symbols such as `C G Am F`, `Cmaj7 | Dm7 G7 | Cmaj7`, slash chords like `C/E`, rests (`R`/`rest`) and per-chord duration suffixes such as `C:2`. The file includes tempo, time signature, General MIDI instrument, velocity and format-0 note events. Voicing controls include close, drop-2, drop-3, spread, root/first/second/third/smooth inversion, optional bass doubling and transposition. Patterns include block chords, up/down/up-down arpeggios and strums. Returns a base64 download envelope for a `.mid` file plus a summary for chat/CLI. Pure Rust/WASM; nothing is uploaded.", "parameters": { "additionalProperties": false, "properties": { "add_bass": { "default": false, "description": "Double the chord's bass note one octave below the voicing. Useful for piano or pad sketches that need a left-hand root.", "type": "boolean" }, "arp_note": { "default": "eighth", "description": "Note value for one arpeggio step. Ignored by block and strum patterns. Default eighth.", "enum": [ "whole", "half", "quarter", "eighth", "sixteenth", "thirty-second" ], "type": "string" }, "beats_per_bar": { "default": 4, "description": "Time-signature numerator written to the MIDI file; denominator is quarter-note based. Default 4 (4/4).", "maximum": 16, "minimum": 1, "type": "integer" }, "beats_per_chord": { "default": 4.0, "description": "Default duration of each chord in beats unless the symbol has a `:beats` suffix. Default 4, so `C G Am F` is four bars in 4/4.", "maximum": 64, "minimum": 0.25, "type": "number" }, "instrument": { "default": "acoustic-grand-piano", "description": "General MIDI instrument program written into the file (default acoustic-grand-piano). Your DAW can replace it later.", "enum": [ "acoustic-grand-piano", "bright-acoustic-piano", "electric-piano", "harpsichord", "vibraphone", "drawbar-organ", "church-organ", "accordion", "acoustic-guitar-nylon", "acoustic-guitar-steel", "electric-guitar-clean", "acoustic-bass", "string-ensemble", "choir-aahs", "synth-pad-warm", "synth-lead-square" ], "type": "string" }, "inversion": { "default": "root", "description": "Bass/inversion choice. `root` keeps the root in the chord bass, first/second/third rotate chord tones up, and `smooth` chooses the nearest inversion to the previous chord.", "enum": [ "root", "first", "second", "third", "smooth" ], "type": "string" }, "note_length": { "default": 95.0, "description": "Gate length as a percentage of the chord slot or arpeggio step, 5-100 (default 95). Lower values make more separation between notes.", "maximum": 100, "minimum": 5, "type": "number" }, "octave": { "default": 4, "description": "Octave for the chord root before voicing and transposition. 4 puts middle C at MIDI note 60 (default 4).", "maximum": 8, "minimum": 0, "type": "integer" }, "pattern": { "default": "block", "description": "Playback pattern. `block` plays the whole chord at once, arpeggio modes step through notes, and `strum` staggers note starts while ending them together.", "enum": [ "block", "arpeggio-up", "arpeggio-down", "arpeggio-updown", "strum" ], "type": "string" }, "progression": { "description": "Chord symbols to render, separated by spaces, bars or new lines. Examples: `C G Am F`, `Cmaj7 | Dm7 G7 | Cmaj7`, `C/E:2 G:2 Am:4`. Use `R` or `rest` for a rest. A `:beats` suffix overrides the default length for that slot. Supports roots with sharps/flats, slash bass notes and common qualities such as m, 7, maj7, m7, dim, aug, sus2, sus4, 6, 9, 11 and 13. Max 64 KiB / 512 chord slots.", "type": "string" }, "tempo": { "default": 120.0, "description": "Tempo in quarter-note beats per minute, written into the MIDI tempo event (default 120, range 20-400).", "maximum": 400, "minimum": 20, "type": "number" }, "transpose": { "default": 0, "description": "Transpose the generated notes after voicing, in semitones from -24 to +24 (default 0).", "maximum": 24, "minimum": -24, "type": "integer" }, "velocity": { "default": 96, "description": "MIDI note-on velocity (loudness), 1-127 (default 96).", "maximum": 127, "minimum": 1, "type": "integer" }, "voicing": { "default": "close", "description": "How chord tones are arranged. `close` stacks them compactly, `drop-2` and `drop-3` move an upper voice down an octave, and `spread` opens the chord over a wider range.", "enum": [ "close", "drop-2", "drop-3", "spread" ], "type": "string" } }, "required": [ "progression" ], "type": "object" } } }