Harmodus Piano - Pure Tuning

A piano and metronome with just intonation. Real-time chord detection, 18 sound sources, and a metronome for odd meters, tuplets and polyrhythms.

Harmodus Piano is a piano keyboard and metronome app with just intonation.

JUST INTONATION • Real-time retuning: the app analyzes the chord you hold and applies pure frequency ratios to its root. • Switch between Equal, Just Major and Just Minor. • Adjustable reference pitch.

CHORD DETECTION • 17 chords detected in real time from the notes you play. • Works with the on-screen keyboard and external MIDI.

18 SOUND SOURCES • Acoustic and synthesizer timbres — organ, clarinet and more, plus waveforms such as sine and sawtooth. • Damper pedal with natural resonance.

METRONOME • 6-track mixer: accent, quarter, eighth, sixteenth, triplet and a custom n-tuplet. • Odd meters (5, 7, …) add a second accent automatically. • Tuplets and 2-beat n-tuplets (e.g. half-note triplets). • A/B alternating patterns, tap tempo, count-in and auto-stop. • Visible edge-flash and per-track click sounds.

MORE • Touch and MIDI keyboard (Bluetooth or cable). • Transpose, sustain / latch. • 34 languages.

Purchase information: Access to all features requires the separate purchase of either a monthly or annual auto-renewable subscription, or a one-time purchase. Eligible new users may be offered a 7-day free trial with either the monthly or annual plan. The one-time purchase does not auto-renew.

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