# «Meandering Sines» byemergent

on 06 Mar'21 09:29 in

8 sine waves, each with a slightly meandering frequency, random phase, slowly varying amplitude, slowly wandering through the stereo field; pitches are chosen from a given chord that is changing at intervals between 18 and 20 seconds.

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```// Meandering Sines
(
// chord choosing function
~chords = Dictionary.new;
~chords.add(\fifth -> [1, 1.5, 2]);
~chords.add(\maj6 -> [1, 1.2, 1.6, 2]);
~chords.add(\min6 -> [1, 1.25, 1.666, 2]);
~chords.add(\maj7 -> [1, 1.25, 1.875, 2]);

// write pitches into array
~dronenotes = [
{~chords[\fifth].choose}!8 * 44.midicps,
{~chords[\maj6].choose}!8 * 41.midicps,
{~chords[\fifth].choose}!8 * 44.midicps,
{~chords[\min6].choose}!8 * 40.midicps
];

s.waitForBoot({
s.sync;

// instrument definition
SynthDef.new(\sine, {
var sig, env;
env = Env.asr(\atk.ir(0.05), 0.75, \rel.ir(2)).kr(2, \gate.kr(1));
sig = SinOsc.ar(
\freq.kr(220, \freqlag.kr(1.2)) + SinOsc.kr({Rand(0.02, 0.06)}, 0, {Rand(0.1, 2.0)}), // frequency: slowly meandering a bit
{Rand(0.0, 2pi)}, // phase
SinOsc.kr({Rand(1/60, 3/60)}).range(0.2, 0.5));  // meandering amplitude
sig = sig * env * \amp.kr(0.2, 0.2);
sig = Pan2.ar(sig, SinOsc.kr(\panfreq.ir(1/10), {Rand(0.0, pi)}, {Rand(0.1, 0.99)})); // meandering panning
Out.ar(\out.kr(0), sig);
s.sync;

Pbindef(\drones,
\instrument, \sine,
\freq, Pseq(~dronenotes,inf),
\amp, 0.06,
\dur, Pwhite(18, 30),
\atk, Pwhite(3.2, 4),
\legato, 1.1,
\out, 0
);
s.sync;
"done".postln;
});
)
// start performance
Pbindef(\drones).play;

// finish performance
Pbindef(\drones).stop;

// wait until sound is off
(
Pbindef(\drones).clear;
s.quit;
)```
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