Modulation Make sure to pay attention to new sharp and flat notes when moving from one key to another. A modulation can be used to change the mood of a piece, eg modulating to the relative minor ...

Modulations Pay attention to new sharp and flat notes when moving from one key to another. A modulation can change the mood of a piece, eg modulating to the relative minor shows that something sad ...

while the regular or ‘natural’ notes fall on the white keys. As well as sharps, the black keys can also be flats - ie, Bb, Db ...