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Everyone has moments when they need quick access to a piano—checking a melody, demonstrating an interval, or simply playing a riff between meetings.
Key Features Two-octave keyboard — The popup presents 24 keys (C4–B5). Click, tap, or use the familiar Q-W-E row mapping for natural play.
Pure Web Audio — Sine-wave oscillators and quick ADSR envelopes generate crisp notes locally; no samples or downloads required.
Practical Benefits Instant creativity – Test motifs the second they appear, without context-switching to another app.
Teaching aid – Share screen and illustrate intervals or chords in real time; perfect for remote lessons.
Ear-training companion – Keep the popup beside notation software or theory quizzes for quick reference.
Ideal User Groups Working musicians and composers needing a pocket-sized scratchpad on any computer.
K-12 and university music teachers illustrating concepts without installing lab software.
Students in theory or ear-training courses who want a dependable reference instrument.
Web developers and audio hobbyists exploring the Web Audio API through a concise codebase.
Casual learners and hobbyists testing melodies or intervals while browsing sheet music.
Keyboard-only users; full computer-keyboard control makes the tool inclusive.
Computer key Piano note MIDI #
A C4 60
W C♯4 / D♭4 61
S D4 62
E D♯4 / E♭4 63
D E4 64
F F4 65
T F♯4 / G♭4 66
G G4 67
Y G♯4 / A♭4 68
H A4 69
U A♯4 / B♭4 70
J B4 71
K C5 72
O C♯5 / D♭5 73
L D5 74
P D♯5 / E♭5 75
; (semicolon) E5 76
' (apostrophe) F5 77
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