Tonal Harmony L2 - The Tower

The Tower is a drone-based ear training app for exploring and internalizing intervals and triads. It presents the seven diatonic chords as an interactive tower diagram where you can tap individual chord tones to hear them singly or in combination against a sustained vocal drone. To see how your ear training is coming along, the app includes a fun and challenging test mode.

Features:

12 tonal centers (all keys)
5 modes: Major, Mixolydian, Dorian, Natural Minor, Harmonic Minor
7 diatonic chords with voice-leading connections displayed visually
Male and female choirs
Closed and open syllable: Mmh & Aah
Adjustable drone/chord mix balance
Function and note name label modes
4 color schemes
Works offline — no internet required

How it works:
Start the drone, then tap spheres in the tower to hear chord tones. The tower diagram shows how chords share tones and connect through voice leading. Switch between chord pairs using the bottom panel. Toggle between solfege function labels and note names to build your understanding from both angles.

Test Mode: Start drone, choose levels, then begin. Listen to the tones played, click the corresponding tones to select. When the timer runs out, you’ll receive feedback as to the accuracy of your selections. There are 10 questions per round.

5 levels in Tower Test Mode:
1) 3rds
2) 6ths
3) 4ths & 5ths.
4) Root Position Triads
5) Chord Inversions

Level 2 of The Tonal Harmony Series:

L1 — The Fan & The Curtain (simple intervals)
L2 — The Tower (intervals and chords)
L3 — The Moons (chords and progressions)