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Press Start listening and allow the microphone.
What you have played pitches in the order you played them, four to a bar
Nothing yet. Sing or play a note.
Every note so far
They will appear here as you play.
Settings
Narrows the search, which makes it more accurate.
The stave shows what you would read, not what sounds.
Decides whether you get F♯ or G♭.
If it is not hearing you properly
Tuning reference
Baroque ensembles often use 415, some orchestras 442.
Other
Nothing is recorded or sent anywhere. The microphone stops the moment you press Stop, and everything is worked out inside this page.
Detection works best on a single sustained note. Chords, a backing track playing in the room, or a very breathy tone will confuse any pitch detector, this one included.