Oscillators and Meter
Single Oscillator with Activity 6-Type Patterns (McAuley)
- 35 patterns: 16 micropulses, 9 events, varying spacing; 4 repetitions
- Oscillator: resting period halfway between shortest and
longest interval in pattern; no decay to resting period
- Performance: oscillator tended to stabilize on easier patterns
- With noise (random deviations from perfect intervals)
added to patterns, performance improved
Multiple Oscillators for Meter Assignment
- Oscillators at a range of resting periods
- Oscillators couple with inputs, may also couple with each
- Oscilllators get activated to the extent that they
couple with inputs (or other oscillators)
- Each level in the meter hierarchy is captured by some period
- How some effects are achieved
- The first and last events in a run tend to be accented.
- Events at the beginning and end of runs can "capture"
more oscillators than those in the middle because there is no competition
from other events on one side.
- Rests tend not to be strongly accented, but may represent
- For a pattern like (1 1 1 0), an oscillator with period
equal to the micropulse (the interval between the events in the run
of 3) could lock onto the events, but it would also "beat" where
the rest is.
- However, for (1 1 1 0), an oscillator with period equal
to the period of the pattern (the interval between the beginnings of
consecutive runs) would "beat" only once for each period and this
would almost certainly not fall on the rest.
- Each of three or more equally spaced events tends to be
- Each time an oscillator finds its zero phase aligned with an
event, it gets strengthened. If there are three equally spaced
events, an oscillator with period close to the interval separating
them and phase zero close to the first event will be quite strong.
- For the pattern (1 1 0), oscillators that beat at the period
of the pattern will be stronger than those which beat at a period
equal to the distance between the first beat and the rest because
they will be aligned with the input more often.
- There will tend not to be 2 strong beats close together.
- If oscillators couple with each other and two oscillators are
aligned with two beats close together, the stronger of the two
may attract the other toward it.
- Periods at a given level will tend to be 2 or 3 times the
period at the next lowest level.
- On average for a pattern that repeats only every 5 primitive
events or rests,
a smaller number of oscillators will be activated than
for one that repeats every 2, 3, or 6 because oscillators for multiples
or fractions of the period will also be activated.
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Last updated: 30 November 1995
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