there are 90 i believe
A key in piano is the black a or white object that can be pressed down to create sound. A key can also mean a certain number of notes that can be played together, creating a scale, cadence and arpeggios. When you talk about the key of a particular piece, if the piece has no sharps or flats, it in in the key of C Major or A Minor. (There are other modes, but I won't get into them.) If the key has flats, the Major key is a Minor fourth (6 half steps) down from the last flat, and the minor key is a minor third, 4 half steps below that. If the key has sharps, the Major key is one half step up from the last sharp, and the Minor key is a minor third 4 half steps below that.
The key notes on a piano scale are the specific notes that make up the scale, starting from the root note and following a specific pattern of whole and half steps to create the desired scale.
There are two half-steps in the key of A: C# to D and G# to A
A half step in music is the smallest interval between two notes. It is the distance of one key on a piano. A whole step is two half steps put together, or the distance of two keys on a piano.
Any key on the standard keyboard is a tritone up from the key 6 half steps below, or down from the key 6 half steps above it. The basic fractional value is 7/5, but this represents 'just intonation', and in equal temperament the fractional value is not followed exactly.
There are two half-steps in the key of F: A to B flat and E to F
There are two half-steps in the key of D: F# to G and C# to D
a half step
The whole steps are like white-white-white but the half steps are white-blue-white. So as you can see two whole steps higher than G is B.
A 128-key piano has 128 keys.
An 85-key piano has 85 keys.
To play a B on the piano, locate the key that is one half step higher than B. This key is the same as B because B is the enharmonic equivalent of C. Press that key to play a B on the piano.