Extension

Mean of recent values, triggered

Source: MCLDTriggeredStatsUGens.sc

Calculates the mean of the most recent length values, but only paying attention to values input while the trigger is greater than zero. One application of this is to calculate a running mean of values coming from FFT analysis.

While trig<=0, the last-measured mean is held constant.

The length argument is set at initialisation, and cannot be modulated. The length is directly reflected in the amount of real-time memory taken by this UGen, so please think carefully before using large values of length. Values in the low single- or double-figures are expected.

s.boot; // Simple polling of mean values - you could do this without a UGen! x = {|val=1, t_trig=0| MeanTriggered.kr(val, t_trig, 3).poll(t_trig, "Mean of recent 3 values"); }.play; x.set(\val, 10.rand.postln, \t_trig, 1); // Execute this repeatedly x.free; // Using it as an audio filter - compare the sounds of these: x = {WhiteNoise.ar(0.1)}.play; x.free; x = {MeanTriggered.ar(WhiteNoise.ar(0.1), 1, 3)}.play; // Note that ".sum" would be more efficient here... x.free; x = {MeanTriggered.ar(WhiteNoise.ar(0.1), 1, 11)}.play; // Note that ".sum" would be more efficient here... x.free;

helpfile source: /usr/local/share/SuperCollider/Extensions/SC3plugins/MCLDUGens/HelpSource/Classes/MeanTriggered.schelp

link::Classes/MeanTriggered::

link::Classes/MeanTriggered::