Combines multiple precise sine tones into a chord — for ear training, testing chord-recognition software, or as a clean reference sound.
The Chord Generator builds chords from pure and band-limited tones: major, minor, 7ths, suspended, diminished, augmented, power chords and 9ths, in any key and octave. Use it to hear intervals, practise ear training, make backing drones or create reference chords.
The notes and their exact frequencies are displayed, and levels are scaled so a four- or five-note chord never clips.
Each chord is a set of semitone offsets from the root (major 0-4-7, minor 0-3-7, dominant 7th 0-4-7-10 and so on). Each note is a band-limited oscillator; with shimmer on, left and right channels are detuned by ±3 cents to create gentle width. Tones are summed with an exponential decay, then the mix is peak-normalised to 0.7 so stacking notes never overloads.
Compare chord qualities.
Audition a chord.
Find harmony notes.
Drones and pads.
| Chords | 12 types |
|---|---|
| Waveforms | Sine, triangle, saw, square |
| Playback | Block or arpeggio up/down |
Root and fifth (and octave) — no third, so neither major nor minor.
Suspended: the third is replaced by a 2nd or 4th.
No — each note is a pure sine tone, so the result sounds clean and synthetic rather than like a real instrument. That purity is exactly what makes it useful for ear training and testing.
This tool runs entirely in your browser using the Web Audio API. Nothing is uploaded, stored or shared — there is no server to send your file to, so it works offline once the page has loaded.
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