84 lines
3.6 KiB
C++
84 lines
3.6 KiB
C++
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// WARNNG: This sketch is too big to fit on an ESP32 w/o PSRAM !
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//Bizarelly, this sounds a little bit like Kraftwerk's 'Metropolis', although it isn't. Funny that.
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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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// Maximilian
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maxiOsc sound,bass,timer,mod,lead,lead2,leadmod;//here are the synth bits
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maxiEnv envelope, leadenvelope;//some envelopes
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maxiFilter filter, filter2;//some filters
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maxiDelayline delay_value;//a delay_value
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convert mtof;//a method for converting midi notes to frequency
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double bassout,leadout, delayout;//some variables to hold the data and pass it around
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int trigger, trigger2, newnote;//some control variables
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int currentCount,lastCount,playHead=0, currentChord=0;//some other control variables
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int pitch[8]={57,57,59,60};//the bassline for the arpeggio
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int chord[8]={0,0,7,2,5,5,0,0};//the root chords for the arpeggio
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float currentPitch,leadPitch;//the final pitch variables
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//here's the lead line trigger array, followed by the pitches
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int leadLineTrigger[256]={1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,0,0,1,0,0,0,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
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int leadLinePitch[15]={69,67,65,64,67,66,64,62,65,64,62,57,55,60,57};
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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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}
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void play(float *output) {//this is where the magic happens. Very slow magic.
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currentCount=(int)timer.phasor(9);//this sets up a metronome that ticks every so often
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if (lastCount!=currentCount) {//if we have a new timer int this sample, play the sound
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trigger=1;//play the arpeggiator line
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trigger2=leadLineTrigger[playHead%256];//play the lead line
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if (trigger2==1) {//if we are going to play a note
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leadPitch=mtof.mtof(leadLinePitch[newnote]);//get the next pitch val
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newnote++;//and iterate
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if (newnote>14) {
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newnote=0;//make sure we don't go over the edge of the array
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}
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}
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currentPitch=mtof.mtof(pitch[(playHead%4)]+chord[currentChord%8]);//write the frequency val into currentPitch
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playHead++;//iterate the playhead
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if (playHead%32==0) {//wrap every 4 bars
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currentChord++;//change the chord
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}
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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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bassout=filter2.lores(envelope.adsr(bass.saw(currentPitch*0.5)+sound.pulse(currentPitch*0.5,mod.phasor(1)),1,0.9995, 0.25, 0.9995, 1, trigger),9250,2);//new, simple ADSR.
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leadout=filter.lores(leadenvelope.ar(lead2.saw(leadPitch*4)+lead.pulse(leadPitch+(leadmod.sinebuf(1.9)*1.5), 0.6), 0.00005, 0.999975, 50000, trigger2),5900,10);//leadline
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delayout=(leadout+(delay_value.dl(leadout, 14000, 0.8)*0.5))/2;//add some delay_value
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if(trigger!=0)trigger=0;//set the trigger to off if you want it to trigger immediately next time.
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output[0]=(bassout)/2;//sum output
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output[1]=(bassout)/2;
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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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