Ensemble Tuner: Chord Detector
Just Intonation for Ensembles
Free · Designed for iPad. Not verified for macOS.
Detects multiple notes and chords simultaneously. See each pitch's deviation from just intonation in real time. For wind band, orchestra, and choir. Fully offline.
During ensemble rehearsal, it's hard to tell whether your part is "a bit flat" or whether the whole band has drifted sharp. Ensemble Tuner analyzes multiple notes simultaneously and visualizes each pitch's deviation in real time.
■ Polyphonic note detection
Using a polyphonic pitch-detection engine (Basic-Pitch) running entirely on-device, Ensemble Tuner recognizes multiple pitches at once — not one note at a time. See all the notes in a chord simultaneously. Ideal for wind bands, string ensembles, choirs, and orchestras.
■ Just intonation target line
A blue line on each tuner bar marks the just intonation sweet spot. Tuning to just intonation instead of equal temperament makes chords blend and resonate. Major 3rd target: −14¢, Perfect 5th: +2¢.
■ Real-time chord detection
Automatically identifies chord names from the detected notes. See "Bb Major," "Cm7," and more while you play.
■ Adjustable reference pitch
Change A4 from 430 to 450 Hz in 1 Hz steps. Default is 442 Hz, standard for wind bands and orchestras.
■ 100% on-device processing
No internet connection needed. All audio processing happens locally on your device in real time. No audio data is sent anywhere.
■ Spectrum view (optional)
A heat-color frequency spectrum panel shows detected note positions as orange vertical markers.
■ Best used for
Tuning sessions, long-tone practice, and held harmonies — any time notes are sustained. Like a guitar polyphonic tuner, the approach is "play, hold, and check." It is not designed to track rapidly changing chords in a fast-moving performance.
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The developer, Daisaku Seto, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
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Information
- Seller
- Daisaku Seto
- Size
- 5.2 MB
- Category
- Music
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Daisaku Seto