Note and rest values are not absolutely defined, but are proportional in duration to all other note and rest values. The whole note is the reference value, and the other notes are named (in American usage) in comparison; i.e. a quarter note is a quarter the length of a whole note.
– The Ancient and Modern hymnbook mostly make use of the Breve, but it is not much in use today. Therefore, the semibreve is considered as the standard note. Equal to two semibreves Example:
– The Semibreve is a whole note, equal to two minim or four crotchets. Example:
– The Minim is a half note, equal to two beats or two crotchets. Example:
– The Crotchet is a quarter note, which is equivalent to one beat or two quavers. Example:
– The Quaver is an eighth note, equal to half beat or two semiquavers. Example:
– The other notes semi-quaver, demi-semiquaver, hemi-demisemiquavers, etc. are half of their predominant note values.