Musical Note: a symbol used to record
processing of different length notes. Most
common notes: Whole note, half note, quarter
note, one eighth note, and one sixteenth note.
Musical note consists of three components:
Head, Stem and Tail. It is also divided by beats,
such as: Whole Note is four beats; Half Note is
two beats, etc.
The number: 1, 2, 3, 4, 5, 6, 7 in musical
symbols is pronounced: do, re, mi, fa, sol, la, si,
Correspondence to: C, D, E, F, G, A, B.
Case 2-Buzzer module
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