In Western music, there are a total of twelve notes per octave, named A, A#, B, C, C#, D, D#, E, F, F#, G and G# . The sharp notes, or ‘accidentals’, fall on the black keys, 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, Eb, Gb, and Ab.
Read moreWhat are frequencies called?
The units of frequency are called hertz (Hz) . Humans with normal hearing can hear sounds between 20 Hz and 20,000 Hz. Frequencies above 20,000 Hz are known as ultrasound.
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