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There may be any number of beats in a measure but the most common by far are multiples of 2 or 3 (i.e., a top number of 2, 3, 4, or 6). Likewise, any note length can be used to represent a beat, but a quarter note (indicated by a bottom number of 4) or eighth note (bottom number of 8) are by far the most common.
The most common tuplet [9] is the triplet (German Triole, French triolet, Italian terzina or tripletta, Spanish tresillo).Whereas normally two quarter notes (crotchets) are the same duration as a half note (minim), three triplet quarter notes have that same duration, so the duration of a triplet quarter note is 2 ⁄ 3 the duration of a standard quarter note.
The system of note types used in mensural notation closely corresponds to the modern system. The mensural brevis is nominally the ancestor of the modern double whole note (breve); likewise, the semibrevis corresponds to the whole note (semibreve), the minima to the half note (minim), the semiminima to the quarter note (crotchet), and the fusa to the eighth note (quaver).
As the name implies, a quarter note's duration is one quarter that of a whole note, half the length of a half note, and twice that of an eighth note. It represents one beat in a bar of 4 4 time. The term "quarter note" is a calque (loan-translation) of the German term Viertelnote.
2: two half-note (minim) beats per measure. Notated and executed like common time (4 4), except with the beat lengths doubled. Indicated by . This comes from a literal cut of the symbol of common time. Thus, a quarter note in cut time is only half a beat long, and a measure has only
A number of dots (n) lengthen the note value by 2 n − 1 / 2 n its value, so two dots add two lower note values, making a total of one and three quarters times its original duration. The rare three dots make it one and seven eighths the duration, and so on.
4 are counted 1 e & a 2 e & a 3 e & a 4 e & a, using numbers for the quarter note, "&" for the eighth note, and "e" and "a" for the sixteenth note level. Triplets may be counted "1 tri ple 2 tri ple 3 tri ple 4 tri ple" and sixteenth note triplets "1 la li + la li 2 la li + la li". [3]
It is in bad form to teach a student to play 3:2 polyrhythms as simply quarter note, eighth note, eighth note, quarter note. The proper way is to establish sound bases for both the quarter-notes, and the triplet-quarters, and then to layer them upon each other, forming multiple rhythms. Beats are indicated with an X; rests are indicated with a ...