THE CHORD ENGINE · LIBRARY OF KEYS

STACK YOUR CHORD.

One flute is a voice. Two is a conversation. Three is a chord.

Pro drone flutes used to mean one key and a pro price — so we put every key, every voice, on one shelf, priced so you can own the chord. Pick a root, add the notes that complete it, and start playing harmony; no theory degree required.

FIRST — PICK YOUR TUNING

Not sure? 432 — our warm default.

Tap a key to begin ↓
Interval Any 2 keys · 432 Hz Root + fifth. Instant harmony. Most popular True Chord Any 3 keys · 432 Hz Root, third and fifth. A full chord. Full Scale Any 4+ keys · 432 Hz Your own library of voices.
Tap a key
We light root · third · fifth
Add the chord in one tap — savings stack, no codes

Chords, ready to lift.

Three voices that already agree — or two heights of the same note.

D Major

The home chord of the Library.

Ships Now

G Major

Ocarina root, flute wings.

Ships Now

A minor

Soft, inward, evening-toned.

Made for You

E minor

The forest key.

Made for You

F# minor

Deep root, close harmony.

Made for You

D4 + D5

Same note, two heights.

Made for You

A3 + A4

Same note, two heights.

Made for You

Find your key.

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Lower keys hum deep. Higher keys sparkle.
No wrong pick — every key is a full instrument.
Tap one and its best partners light up.

Three small doors in.

1

What's a drone?

A drone flute sings two voices at once: one chamber holds a steady root note while the melody walks above it. That steady note is the drone — the ground the melody stands on.

2

What's a chord?

Three notes stacked: a root, a third, a fifth. Played together, they agree — that agreement is a chord. Three flutes tuned to D, F# and A make a D major chord you can share across three pairs of hands.

3

432 or 440?

A4 = 440 Hz is the modern concert standard. 432 Hz tunes the same instrument slightly lower — many players find it softer and warmer. Neither is wrong: pick the reference your other instruments live in. Most keys here come in both.

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