Harmonic

A Raycast extension for searching musical notes and chords, viewing their frequencies, and playing them as tones.

Features

Search Notes

Search by name using natural language ("A flat", "C sharp") or symbols ("Ab", "C#", "Bb"). Select a note to see all octaves (0-8) with:

• Frequency in Hz
• MIDI note number
• Octave range label (Sub-bass through Extreme)
• Notable labels (Middle C, Concert A, etc.)

Search Chords

Search using lead sheet / chord symbol notation:

• Triads: C, Dm, Edim, Faug, Gsus4
• Seventh chords: Cmaj7, Dm7, G7, Am7b5
• Extended: C9, Dm11, G13
• Altered: G7#9, C7b5, D7#11
• Jazz voicings: Cmaj7#11, Dm6/9, G7alt

Chord types are labeled by category (Triad, Seventh, Extended, Altered, Jazz, Lydian, Modal) and autocomplete as you type.

Audio Playback

• Tone types: Warm (default), Pure Sine, Bright, Soft Decay
• Durations: 1s, 2s (default), 5s, or infinite
• Stack pitches by playing multiple notes or chords
• Stop all with Cmd+Shift+S

Install

npm install
npm run dev

Then open Raycast and search for "Search Notes" or "Search Chords".

Keyboard Shortcuts

Shortcut	Action
Cmd+1	Play for 1 second
Cmd+2	Play for 2 seconds
Cmd+5	Play for 5 seconds
Cmd+0	Play infinitely
Cmd+Shift+S	Stop all playback
Cmd+C	Copy frequency / chord notes
Cmd+Shift+C	Copy note name / frequencies