How many keys does a standard modern piano have?
Answer88
A full piano has 88 keys.
Music · Facts & stats
Pitch facts & stats
7 fact-checked facts about musical pitch, sound frequency and tuning, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Which unit measures frequency?
AnswerHertz
One hertz is one cycle per second.
Going deeper
What is the standard tuning frequency for the A above middle C?
Answer440 Hz
A440 is the common concert pitch standard.
The change in pitch of a passing siren is called what?
AnswerThe Doppler effect
Motion compresses or stretches the sound waves.
The ability to name a note without any reference note is called what?
AnswerAbsolute (perfect) pitch
Absolute pitch is identifying notes with no reference.
Expert level
Who invented the tuning fork in 1711?
AnswerJohn Shore
English trumpeter John Shore invented it.
What is the approximate frequency of the lowest note (A0) on a standard piano?
Answer27.5 Hz
A0 is four octaves below A440: 440 ÷ 16 = 27.5 Hz.
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