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The sample holds C4, E4, and G4 together, and that chord is named C. C4 is 261.63 hertz, E4 is 329.63 hertz, and G4 is 392.00 hertz. One octave up, C5 is 523.25 hertz.
Why this exists
This is a keyboard you play in the browser. Middle C is C4. It is separate from the metronome, which only clicks the beat.
On a computer, Z plays the white key C and S plays the black key C#. Q plays the C one octave higher.
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01How to use it
Press the keys, or play Z through M for the white keys and S D G H J for the black keys.
Sample holds C4, E4, and G4 together and names the chord C.
Record collects the notes, then Replay plays them back and Download saves a text file.
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02What you get
The line shows the chord name, the latest note, and the hertz.
The octave buttons move the start key from C2 up to C5.
Sustain lets a note ring a little after the finger lifts.
EnteredC major, C E G
C4 middle C 261.63 hertz of C4 392.00 hertz of G4 523.25 hertz of C5 -
03Worth knowing
Pitch uses equal temperament with A4 at 440 hertz.
Sound starts when a key is pressed. If it stays quiet, press Sample once more.
The recording stays in this browser. Nothing is sent to a server.
Questions
- QWhat is C4?
- AMiddle C. The Z key plays it.
- QWhat is 261.63?
- AThe hertz of C4.
- QWhat is the chord C?
- AThe name of C4, E4, and G4 held together.
- QWhat is 523.25?
- AThe hertz of C5, one octave up.
How this page works it out
This page is a piano you play in the browser. Middle C is C4 at 261.63 hertz. The sample holds C4, E4, and G4 together, and that chord is named C. E4 is 329.63 hertz and G4 is 392.00 hertz.
One octave up, C5 is 523.25 hertz. The reference A is 440 hertz, and the pitch is equal temperament. The Z key plays C4, S plays the next black key, and Q plays C5. The octave moves from C2 up to C5.
This is separate from the metronome, which only clicks. Record saves the notes as text. They stay in this browser and nothing is sent to a server.