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
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
#include "maximilian.h"
#include "libs/maxim.h"
//This shows how to use maximilian to build a polyphonic synth.
//These are the synthesiser bits
maxiOsc VCO1[6],VCO2[6],LFO1[6],LFO2[6];
maxiFilter VCF[6];
maxiEnv ADSR[6];
//This is a bunch of control signals so that we can hear something
maxiOsc timer;//this is the metronome
int currentCount,lastCount,voice=0;//these values are used to check if we have a new beat this sample
//and these are some variables we can use to pass stuff around
double VCO1out[6],VCO2out[6],LFO1out[6],LFO2out[6],VCFout[6],ADSRout[6],mix,pitch[6];
maxiFFTOctaveAnalyzer octo;
int nAverages;
float *ifftOutput;
int ifftSize;
maxiIFFT ifft;
maxiFFT mfft;
int fftSize;
int bins, dataSize;
void setup() {//some inits
fftSize = 1024;
mfft.setup(fftSize, 1024, 256);
ifft.setup(fftSize, 1024, 256);
nAverages = 12;
octo.setup(44100, fftSize/2, nAverages);
for (int i=0;i<6;i++) {
ADSR[i].setAttack(0);
ADSR[i].setDecay(200);
ADSR[i].setSustain(0.2);
ADSR[i].setRelease(2000);
}
}
void play(double *output) {
mix=0;//we're adding up the samples each update and it makes sense to clear them each time first.
//so this first bit is just a basic metronome so we can hear what we're doing.
currentCount=(int)timer.phasor(8);//this sets up a metronome that ticks 8 times a second
if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound
if (voice==6) {
voice=0;
}
ADSR[voice].trigger=1;//trigger the envelope from the start
pitch[voice]=voice+1;
voice++;
lastCount=0;
cout << mfft.spectralFlatness() << ", " << mfft.spectralCentroid() << endl;
for (int i=0; i<octo.nAverages; i++) {
cout << octo.averages[i] << " ,";
} cout << endl;
}
//and this is where we build the synth
for (int i=0; i<6; i++) {
ADSRout[i]=ADSR[i].adsr(1.,ADSR[i].trigger);//our ADSR env is passed a constant signal of 1 to generate the transient.
LFO1out[i]=LFO1[i].sinebuf(0.2);//this lfo is a sinewave at 0.2 hz
VCO1out[i]=VCO1[i].pulse(55*pitch[i],0.6);//here's VCO1. it's a pulse wave at 55 hz, with a pulse width of 0.6
VCO2out[i]=VCO2[i].pulse((110*pitch[i])+LFO1out[i],0.2);//here's VCO2. it's a pulse wave at 110hz with LFO modulation on the frequency, and width of 0.2
VCFout[i]=VCF[i].lores((VCO1out[i]+VCO2out[i])*0.5, 250+((pitch[i]+LFO1out[i])*1000), 10);//now we stick the VCO's into the VCF, using the ADSR as the filter cutoff
mix+=VCFout[i]*ADSRout[i]/6;//finally we add the ADSR as an amplitude modulator
}
output[0]=mix*0.5;//left channel
output[1]=mix*0.5;//right channel
if (mfft.process(mix)) {
//do some manipulation
mfft.magsToDB();
octo.calculate(mfft.magnitudesDB);
}
//inverse fft
// This just sends note-off messages.
for (int i=0; i<6; i++) {
ADSR[i].trigger=0;
}
}
|
