Peak track peak signal amplitude

Peak.ar(in, trig)

Outputs the peak amplitude of the signal received at the input.

When triggered, the maximum output value is reset to the current value.

in - input signal.

trig - A trigger resets the output value to the current input value.

A trigger happens when the signal changes from non-positive to positive.

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 RunningMin and RunningMax UGens.

(

{

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;

)