RHPF

RHPF.ar(in, freq, q, mul, add)

A resonant high pass filter. 

in - input signal to be processed

freq - cutoff frequency.

rq - the reciprocal of Q.  bandwidth / cutoffFreq. 

{ RHPF.ar(Saw.ar(200,0.1), FSinOsc.kr(XLine.kr(0.7,300,20), 0, 3600, 4000), 0.2) }.play;

(

{ var ctl = RHPF.kr(LFSaw.kr(2), SinOsc.kr(XLine.kr(0.07,30,20), 0, 35, 40), 0.05);

SinOsc.ar(ctl * 200 + 500);

}.play;

)