b = Buffer.read(s, "/Users/lcoogan/snd/installation/zeitlin-six_lines.wav");

(
SynthDef(\voiceObscured, {
	arg out=0, bufnum, rate=1, shift=0, cutoff=1200, amp = 40;
    var sig;
    sig = PlayBuf.ar(1, bufnum, BufRateScale.kr(bufnum) * rate, doneAction: 2);
	sig = NoiseRepellent.ar(sig, learner:NRAverage(\isLearning.kr(0)));

    sig = PitchShift.ar(sig, 0.2, 2.pow(shift / 12), 0.01, 0.01);
    sig = LPF.ar(sig, cutoff); // soften sibilance
	// sig = BPF.ar(sig, 60, 0.001).neg + sig;  // cancels 60Hz hum
	// sig = BPF.ar(sig, 120, 0.001).neg + sig; // cancels 2nd harmonic

    sig = sig * amp ;
    Out.ar(out, sig.dup);
}).add;
)

Synth(\voiceObscured, [\bufnum, b, \shift, -7, \cutoff, 1000, \amp, 40]);
Synth(\voiceObscured, [\isLearning, 1]); // capture some noise
Synth(\voiceObscured, [\isLearning, 0]); // start the script