IEnvGen envelope generator for polling values from an InterplEnv

superclass: UGen

*ar(ienvelope, index, mul, add)

*kr(ienvelope, index, mul, add)

Plays back break point envelopes from the index point. The envelopes are instances of the InterplEnv class. See the InterplEnv help file for more info. 

ienvelope an instance of InterplEnv (this is static for the life of the UGen)

index a point to access within the InterplEnv

// example

SynthDef(\test, {arg gate = 1;

var env, sin;

sin = SinOsc.ar(440, 0, 1);

env = InterplEnv([0, 0.6, 0.3, 1.0, 0], [0.1, 0.02, 0.4, 1.1], [\lin, \exp, -6, \sin]).plot; Out.ar(0, sin * 

// use MouseX to index into the InterplEnv to control amps

IEnvGen.kr(env, MouseX.kr(0, env.times.sum)) *

EnvGen.kr(Env.asr(0.01, 1, 0.01), gate, doneAction: 2);

)

}).load(s);

s = Server.internal.boot;

s.scope;

s.sendMsg(\s_new, \test, a = s.nextNodeID, 0, 1);

s.sendMsg(\n_set, a, \gate, 0);

// index with an SinOsc ... mouse controls amplitude of SinOsc

SynthDef(\test, {

var env, sin;

sin = SinOsc.ar(440, 0, MouseX.kr(0, 1));

// use offset so negative values of SinOsc will map into the InterplEnv

env = InterplEnv([-1, -0.7, 0.7, 1], [ 0.8666, 0.2666, 0.8668 ], \lin, -1.0);

Out.ar(0, IEnvGen.ar(env, sin)) 

}).load(s);

s.sendMsg(\s_new, \test, a = s.nextNodeID, 0, 1);

s.sendMsg(\n_free, a);

// index with Amplitude of input, control freq of SinOsc

SynthDef(\test, {arg inbus;

var env, point;

point = Amplitude.ar(In.ar(inbus), 0.01, 0.2);

// use offset so negative values of SinOsc will map into the InterplEnv

env = InterplXYC([[0, 330, \exp], [0.5, 440, \exp], [1.0, 1760]]);

Out.ar(1, SinOsc.ar(IEnvGen.kr(env, point), 0, 0.2)) 

}).load(s);

s.sendMsg(\s_new, \test, a = s.nextNodeID, 0, 1, \inbus, s.options.numOutputBusChannels);

s.sendMsg(\n_free, a);