Middle C is the most important key in music
because it is the key from which all other notes are
referenced.
Middle C
on the piano is the C key that is the closest to the middle!
All keyboards have a Middle C but not always in the same position due to the
different number of keys available on keyboards.
There are two main sizes of keyboards - 49 notes and 61 notes.
MIDDLE C is highlighted in green in the keyboards below.