aboutsummaryrefslogtreecommitdiffstats
path: root/maximilian_examples/10.Filters.cpp
blob: 2c1240c46d8678cc73a0f202553febe9d1d94fd1 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
// Here is an example of a Maximilian filter being used.
// There are a number of filters in Maximilian, including low and high pass filters.
// There are also resonant filters and a state variable filter.


#include "maximilian.h"

maxiOsc myCounter,mySwitchableOsc;//
int CurrentCount;//
double myOscOutput,myCurrentVolume, myFilteredOutput;//
maxiEnv myEnvelope;
maxiFilter myFilter;

void setup() {//some inits
    
    //Timing is in ms
    
    myEnvelope.setAttack(0);
    myEnvelope.setDecay(1);  // Needs to be at least 1
    myEnvelope.setSustain(1);
    myEnvelope.setRelease(1000);
    
}

void play(double *output) {
    
    myCurrentVolume=myEnvelope.adsr(1.,myEnvelope.trigger);
    
    CurrentCount=myCounter.phasor(1, 1, 9);//phasor can take three arguments; frequency, start value and end value.
    
    // You'll notice that these 'if' statements don't require curly braces "{}".
    // This is because there is only one outcome if the statement is true.
    
    if (CurrentCount==1) myEnvelope.trigger=1; //trigger the envelope
    
    else myEnvelope.trigger=0;//release the envelope to make it fade out only if it's been triggered
    
    myOscOutput=mySwitchableOsc.sawn(100);
    
    // Below, the oscilator signals are being passed through a low pass filter.
    // The middle input is the filter cutoff. It is being controlled by the envelope.
    // Notice that the envelope is being amplified so that it scales between 0 and 1000.
    // The last input is the resonance.
    myFilteredOutput=myFilter.lores(myOscOutput,myCurrentVolume*1000,10);
    
    output[0]=myFilteredOutput;//left speaker
    output[1]=output[0];
    
}