79 lines
2.2 KiB
C++
Executable File
79 lines
2.2 KiB
C++
Executable File
//This shows how to use maximilian to build a monophonic synth
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#include "AudioTools.h"
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#include "AudioTools/AudioLibs/MaximilianDSP.h"
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// Define Arduino output
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I2SStream out;
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Maximilian maximilian(out);
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//These are the synthesiser bits
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maxiOsc VCO1,VCO2,LFO1,LFO2;
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maxiFilter VCF;
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maxiEnv V_ADSR;
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//This is a bunch of control signals so that we can hear something
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maxiOsc timer;//this is the metronome
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int currentCount,lastCount;//these values are used to check if we have a new beat this sample
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//and these are some variables we can use to pass stuff around
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double VCO1out,VCO2out,LFO1out,LFO2out,VCFout,ADSRout;
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void setup() {//some inits
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// setup logging
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Serial.begin(115200);
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AudioToolsLogger.begin(Serial, AudioToolsLogLevel::Info);
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// setup audio output
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auto cfg = out.defaultConfig(TX_MODE);
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out.begin(cfg);
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maximilian.begin(cfg);
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// setup maximilian
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V_ADSR.setAttack(1000);
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V_ADSR.setDecay(1);
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V_ADSR.setSustain(1);
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V_ADSR.setRelease(1000);
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}
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void play(float *output) {
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//so this first bit is just a basic metronome so we can hear what we're doing.
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currentCount=(int)timer.phasor(0.5);//this sets up a metronome that ticks every 2 seconds
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if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound
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V_ADSR.trigger=1;
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cout << "tick\n";//the clock ticks
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lastCount=0;//set lastCount to 0
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}
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//and this is where we build the synth
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ADSRout=V_ADSR.adsr(1.0,V_ADSR.trigger);
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LFO1out=LFO1.sinebuf(0.2);//this lfo is a sinewave at 0.2 hz
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VCO1out=VCO1.pulse(55,0.6);//here's VCO1. it's a pulse wave at 55 hz, with a pulse width of 0.6
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VCO2out=VCO2.pulse(110+LFO1out,0.2);//here's VCO2. it's a pulse wave at 110hz with LFO modulation on the frequency, and width of 0.2
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VCFout=VCF.lores((VCO1out+VCO2out)*0.5, ADSRout*10000, 10);//now we stick the VCO's into the VCF, using the V_ADSR as the filter cutoff
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double finalSound=VCFout*ADSRout;//finally we add the V_ADSR as an amplitude modulator
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V_ADSR.trigger=0;
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output[0]=finalSound;
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output[1]=finalSound;
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}
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// Arduino loop
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void loop() {
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maximilian.copy();
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}
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