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class:: RunningSum
summary:: Running sum over n frames
categories:: UGens>Analysis, UGens>Maths
description::
A running sum over a user specified number of samples, useful for running RMS power windowing.
classmethods::
method:: ar, kr
argument::in
Input signal
argument::numsamp
How many samples to take the running sum over (initialisation time only, not modulatable. default: 40)
examples::
code::
// distorts of course - would need scaling
{ RunningSum.ar(SoundIn.ar) }.play
// Running Average over x samples
(
{
var x = 100;
RunningSum.ar(LFSaw.ar, x) * (x.reciprocal)
}.play
)
::
code::
// RMS Power
(
{
var input, numsamp;
input = LFSaw.ar;
numsamp = 30;
(RunningSum.ar(input.squared, numsamp) / numsamp).sqrt
}.play
)
::
code::
// shortcut in class
{ RunningSum.rms(SoundIn.ar) }.play
::
code::
// play around
(
{
var input, numsamp, power;
numsamp = 500;
input = SoundIn.ar;
power = MouseX.kr(0.1, 4);
(RunningSum.ar(input ** power, numsamp)/numsamp) ** (power.reciprocal)
}.play
)
::
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