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In this lesson we are looking at how the time value or duration of notes is conveyed in Standard Notation.
The longest note we use in modern music is known as a semibreve or whole note.
Next comes the Minim or Half note
Two Minims have the same duration as one Semibreve
Half a minim is a crotchet or quarter note
There are four of these to a semibreve or wholenote
Half a crotchet is a quaver or eighth note
There are eight of these to a semibreve or wholenote
The shortest note commonly found in written music is a semiquaver or sixteenth note
There are sixteen semiquavers to a semibreve or whole note.
Quavers and semiquavers often appear grouped together like this
Which makes it easier to read when there are a lot of them.
So the whole system has a neat logic to it with each note being worth half the duration of the one above it. Here they all are in a diagram that shows their equivalence
Each line in the diagram has the same total duration.
But as well as notes, music often contains gaps of silence between notes and these too have specific duration. So for each note there is a rest symbol that has the same value
A dot after a note simply extends its time value by 50%. That is to say it makes the note longer by half its normal value.
So the dotted crotchet or quarter note is worth 1-and-a-half beats or the same as a crotchet plus a quaver.
The dotted Minim or half-note is worth three beats or the same as a minim plus a crotchet.
Dots have the same affect when applied to rests:
Sometimes a tie is used instead of a dot to extend the duration of a note.
Finally we come to the subject of triplets. Occasionally, we want to make three notes of equal length last as long as two notes normally would. This is called a triplet.
A triplet is indicated by a figure three placed over a group of three notes.
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