MusoKit music tools

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Chords, scales, transposition, capo and tempo maths, with links to free interactive music tools.

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bpm_to_ms Read-only

Note lengths in milliseconds (straight, dotted, triplet) for a tempo, for setting delay, reverb pre-delay and LFO times.

bpmnumber, required

Tools (6)

bpm_to_ms

Note lengths in milliseconds (straight, dotted, triplet) for a tempo, for setting delay, reverb pre-delay and LFO times.

read-only

Argument	Type	Description
bpm*	number

Input schema (JSON)

{
  "type": "object",
  "required": [
    "bpm"
  ],
  "properties": {
    "bpm": {
      "type": "number",
      "maximum": 400,
      "minimum": 20
    }
  }
}

capo_finder

For a song's chords, finds the capo fret that lets a guitarist play it with the easiest open chord shapes. Returns the top options and a link to the capo calculator.

read-only

Argument	Type	Description
chords*	string	Chords as written in the song, e.g. "Bb Gm Eb F".

Input schema (JSON)

{
  "type": "object",
  "required": [
    "chords"
  ],
  "properties": {
    "chords": {
      "type": "string",
      "description": "Chords as written in the song, e.g. \"Bb Gm Eb F\"."
    }
  }
}

chord_info

Notes, formula and a guitar fingering for a chord symbol such as "Am7", "F#m", "Bbmaj7" or "C/G", plus free diagram image URLs and a link where the user can hear and see the chord.

read-only

Argument	Type	Description
chord*	string	Chord symbol, e.g. "Am7", "F#m", "Bbmaj7", "Dsus4", "C/G".

Input schema (JSON)

{
  "type": "object",
  "required": [
    "chord"
  ],
  "properties": {
    "chord": {
      "type": "string",
      "description": "Chord symbol, e.g. \"Am7\", \"F#m\", \"Bbmaj7\", \"Dsus4\", \"C/G\"."
    }
  }
}

open_music_tool

Returns a ready-to-open link to a free MusoKit tool, preset where possible: a tuner for a specific instrument or tuning, a metronome at a tempo, a tone at a frequency, etc. Use when the user needs to actually tune, keep time or hear something.

read-only

Argument	Type	Description
bpm	number	Tempo (metronome only).
tool*	string
beats	integer	Beats per bar (metronome only).
frequency	number	Frequency in Hz (tone-generator only).
instrument	string	Tuner preset (tuner only).

Input schema (JSON)

{
  "type": "object",
  "required": [
    "tool"
  ],
  "properties": {
    "bpm": {
      "type": "number",
      "description": "Tempo (metronome only)."
    },
    "tool": {
      "enum": [
        "tuner",
        "metronome",
        "drum-machine",
        "tone-generator",
        "chord-finder",
        "scale-explorer",
        "circle-of-fifths",
        "capo-calculator",
        "transpose",
        "chord-progression-generator",
        "chord-player",
        "ear-trainer",
        "rhythm-trainer",
        "speed-trainer",
        "bpm-to-ms"
      ],
      "type": "string"
    },
    "beats": {
      "type": "integer",
      "description": "Beats per bar (metronome only)."
    },
    "frequency": {
      "type": "number",
      "description": "Frequency in Hz (tone-generator only)."
    },
    "instrument": {
      "enum": [
        "guitar-std",
        "guitar-dropd",
        "guitar-halfdown",
        "open-g",
        "open-d",
        "dadgad",
        "bass-std",
        "bass-5",
        "ukulele",
        "violin",
        "mandolin",
        "cello",
        "chromatic"
      ],
      "type": "string",
      "description": "Tuner preset (tuner only)."
    }
  }
}

scale_info

Notes and step pattern of a scale or mode, with a link to hear it and see it on piano and guitar. Scales: major, minor, dorian, phrygian, lydian, mixolydian, locrian, harmonic-minor, melodic-minor, major-pentatonic, minor-pentatonic, blues, whole-tone, phrygian-dominant.

read-only

Argument	Type	Description
root*	string	Root note, e.g. "C", "F#", "Bb".
scale	string	Scale name, e.g. "major", "minor", "dorian", "minor-pentatonic", "blues".

Input schema (JSON)

{
  "type": "object",
  "required": [
    "root"
  ],
  "properties": {
    "root": {
      "type": "string",
      "description": "Root note, e.g. \"C\", \"F#\", \"Bb\"."
    },
    "scale": {
      "type": "string",
      "description": "Scale name, e.g. \"major\", \"minor\", \"dorian\", \"minor-pentatonic\", \"blues\"."
    }
  }
}

transpose_chords

Transpose a chord progression up or down, either by semitones or from one key to another. Returns the new chords and a link to the transposer.

read-only

Argument	Type	Description
chords*	string	Chords separated by spaces or commas, e.g. "C G Am F".
to_key	string	Target key, e.g. "E".
from_key	string	Original key, e.g. "C" (alternative to semitones).
semitones	integer	Semitones to move (positive = up).

Input schema (JSON)

{
  "type": "object",
  "required": [
    "chords"
  ],
  "properties": {
    "chords": {
      "type": "string",
      "description": "Chords separated by spaces or commas, e.g. \"C G Am F\"."
    },
    "to_key": {
      "type": "string",
      "description": "Target key, e.g. \"E\"."
    },
    "from_key": {
      "type": "string",
      "description": "Original key, e.g. \"C\" (alternative to semitones)."
    },
    "semitones": {
      "type": "integer",
      "maximum": 11,
      "minimum": -11,
      "description": "Semitones to move (positive = up)."
    }
  }
}