Playing around with generating some descending harmonic series from a base tone in super collider: https://soundcloud.com/hidinginabunker/harmonic-series-1

harmonic_series_1.scd

// initialize some wiggle room to add some stank
var wiggle = [0.0, 0.2, 0.3, 0.4, 0.5].choose;

// select some base tone and add some wiggle room so we get some more interesting pure tones
var baseTone = [
	440*2+wiggle,
	440*3+wiggle,
	440*4+wiggle
].choose;


// create some harmonic series from the base tone
var tones = List[
	baseTone,
	baseTone/2,
	baseTone/3,
	baseTone/4,
	baseTone/5,
].reverse; // ascending is nicer

{
	// play each tone in the series after waiting a randomly selected time
	tones.do({
		arg tone;
		tone.postln;
		{SinOsc.ar(tone, [0,1] , 0.05)}.play;
		[0.5, 0.7, 1.0].choose.wait;
	})
}.fork;