Interonset interval
Encyclopedia
In music
the interonset interval or IOI is the time
between the beginnings or attack-points of successive events or note
s, the interval between onset
s, not including the duration of the events. For example, two sixteenth note
s separated by dotted eighth rest
would have the same interonset interval as between a quarter note
and a sixteenth note. The concept is often useful for considering rhythm
s and meters
.
Music
Music is an art form whose medium is sound and silence. Its common elements are pitch , rhythm , dynamics, and the sonic qualities of timbre and texture...
the interonset interval or IOI is the time
Time
Time is a part of the measuring system used to sequence events, to compare the durations of events and the intervals between them, and to quantify rates of change such as the motions of objects....
between the beginnings or attack-points of successive events or note
Note
In music, the term note has two primary meanings:#A sign used in musical notation to represent the relative duration and pitch of a sound;#A pitched sound itself....
s, the interval between onset
Onset (audio)
Onset refers to the beginning of a musical note or other sound, in which the amplitude rises from zero to an initial peak. It is related to the concept of a transient: all musical notes have an onset, but do not necessarily include an initial transient.In phonetics the term is used differently -...
s, not including the duration of the events. For example, two sixteenth note
Sixteenth note
thumb|right|Figure 1. A sixteenth note with stem facing up, a sixteenth note with stem facing down, and a sixteenth rest.thumb|right|Figure 2. Four sixteenth notes beamed together....
s separated by dotted eighth rest
Rest (music)
A rest is an interval of silence in a piece of music, marked by a sign indicating the length of the pause. Each rest symbol corresponds with a particular note value:The quarter rest may also be found as a form in older music....
would have the same interonset interval as between a quarter note
Quarter note
A quarter note or crotchet is a note played for one quarter of the duration of a whole note . Often people will say that a crotchet is one beat, however, this is not always correct, as the beat is indicated by the time signature of the music; a quarter note may or may not be the beat...
and a sixteenth note. The concept is often useful for considering rhythm
Rhythm
Rhythm may be generally defined as a "movement marked by the regulated succession of strong and weak elements, or of opposite or different conditions." This general meaning of regular recurrence or pattern in time may be applied to a wide variety of cyclical natural phenomena having a periodicity or...
s and meters
Metre (music)
Meter or metre is a term that music has inherited from the rhythmic element of poetry where it means the number of lines in a verse, the number of syllables in each line and the arrangement of those syllables as long or short, accented or unaccented...
.
Further reading
- Oxford, Parncutt and Mc Pherson (ed.)(2002). The Science and Psychology of Music Performance, p. 200-202. ISBN 0-19-513810-4