Can I learn piano without a real piano?

Yes. Our online virtual piano lets you practice, record, and play back songs using just your computer keyboard or mouse — no physical piano needed to get started.

Is this virtual piano really free to download?

PlayPiano.me runs entirely in your browser. There is nothing to download or install — just open the page and start playing instantly.

Is this good for beginners?

Absolutely. The interactive keyboard shows note names and key hints, includes built-in demo songs, and helps beginners learn note positions and simple melodies at their own pace.

音楽理論 - コードとスケール

Intervals

Technical name per semitone distance

Interval	Technical name
1 semitone	minor second
2 semitones	major second
3 semitones	minor third
4 semitones	major third
5 semitones	perfect fourth
6 semitones	tritone

Interval	Technical name
7 semitones	perfect fifth
8 semitones	minor sixth
9 semitones	major sixth
10 semitones	minor seventh
11 semitones	major seventh
12 semitones	octave

Basic Chords

Common triads & suspended chords

major triads
minor triads
diminished triads
augmented triads
suspended second chords
suspended fourth chords

Scales

Most-used scale families

major scales
natural minor scales
harmonic minor scales
melodic minor scales
major pentatonic scales
minor pentatonic scales
blues scales
chromatic scales

Seventh Chords

Common seventh chord families

dominant seventh chords
major seventh chords
minor seventh chords
minor major seventh chords
diminished seventh chords
augmented seventh chords
half-diminished seventh chords
augmented major seventh chords

Other Chords

Additional chord types

diminished triads
augmented triads
augmented chords

The names of piano keys

Note that the interval between two adjacent sounds in this table is one semitone horizontally and one octave vertically.

with frequencies:

音楽理論リファレンス - コード・スケール・音程