In a stave system

Two notes on a neighbouring line and space form a second. Depending on where the second is located, it can be a minor second (m2) or major second (M2).

On a keyboard

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If there are no other keys between the two marked ones it is a minor second. If there is one other key (black or white) between the two notes it is a major second.

Examples


Beethoven's For Elise


Happy Birthday


The Beatles' Yesterday


The second in a C-Major scale

In a C-Major scale all neighbouring notes are seconds. In the image below the minor seconds are connected with two lines.

c-major scale

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