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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 | class:: Peak
summary:: Track peak signal amplitude.
related:: Classes/PeakFollower
categories:: UGens>Analysis>Amplitude
Description::
Outputs the peak amplitude of the signal received at the input. When
a trigger occurs at the code::reset:: input, the maximum
output value is reset to the current value.
Internally, the absolute value of the signal is used, to prevent
underreporting the peak value if there is a negative DC offset. To obtain
the minimum and maximum values of the signal as is, use the
link::Classes/RunningMin:: and link::Classes/RunningMax:: UGens.
classmethods::
method::ar, kr
argument::in
The input signal.
argument::trig
Trigger. Resets the output value to the current input value. A trigger happens when the signal changes from non-positive to positive.
Examples::
code::
(
{
SinOsc.ar(
Peak.ar(Dust.ar(20), Impulse.ar(0.4)) * 500 + 200,
0, 0.2
)
}.play;
)
// follow a sine lfo, reset rate controlled by mouse x
(
{
SinOsc.ar(
Peak.kr(SinOsc.kr(0.2), Impulse.kr(MouseX.kr(0.01, 2, 1))) * 500 + 200,
0, 0.2
)
}.play;
)
::
|