diff options
Diffstat (limited to 'main.cpp')
| -rwxr-xr-x | main.cpp | 98 |
1 files changed, 59 insertions, 39 deletions
@@ -1,61 +1,81 @@ #include "maximilian.h" -//Bizarelly, this sounds a little bit like Kraftwerk's 'Metropolis', although it isn't. Funny that. +//This shows how to use maximilian to build a polyphonic synth. -maxiOsc sound,bass,timer,mod,lead,lead2,leadmod;//here are the synth bits -maxiEnv envelope, leadenvelope;//some envelopes -maxiFilter filter, filter2;//some filters -maxiDelayline delay;//a delay -convert mtof;//a method for converting midi notes to frequency -double bassout,leadout, delayout;//some variables to hold the data and pass it around -int trigger, trigger2, newnote;//some control variables -int currentCount,lastCount,playHead=0, currentChord=0;//some other control variables -int pitch[8]={57,57,59,60};//the bassline for the arpeggio -int chord[8]={0,0,7,2,5,5,0,0};//the root chords for the arpeggio -float currentPitch,leadPitch;//the final pitch variables +//These are the synthesiser bits +maxiOsc VCO1[6],VCO2[6],LFO1[6],LFO2[6]; +maxiFilter VCF[6]; +maxiEnv ADSR[6]; -//here's the lead line trigger array, followed by the pitches -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}; -int leadLinePitch[15]={69,67,65,64,67,66,64,62,65,64,62,57,55,60,57}; +//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]; void setup() {//some inits + 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) {//this is where the magic happens. Very slow magic. +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(9);//this sets up a metronome that ticks every so often + 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 - trigger=1;//play the arpeggiator line - trigger2=leadLineTrigger[playHead%256];//play the lead line - if (trigger2==1) {//if we are going to play a note - leadPitch=mtof.mtof(leadLinePitch[newnote]);//get the next pitch val - newnote++;//and iterate - if (newnote>14) { - newnote=0;//make sure we don't go over the edge of the array - } + + if (voice==6) { + voice=0; } - currentPitch=mtof.mtof(pitch[(playHead%4)]+chord[currentChord%8]);//write the frequency val into currentPitch - playHead++;//iterate the playhead - if (playHead%32==0) {//wrap every 4 bars - currentChord++;//change the chord - } - //cout << "tick\n";//the clock ticks - lastCount=0;//set lastCount to 0 + + ADSR[voice].trigger=1;//trigger the envelope from the start + pitch[voice]=voice+1; + voice++; + } - 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. - 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 + //and this is where we build the synth - delayout=(leadout+(delay.dl(leadout, 14000, 0.8)*0.5))/2;//add some delay + 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 + + + } - if(trigger!=0)trigger=0;//set the trigger to off if you want it to trigger immediately next time. + output[0]=mix*0.5;//left channel + output[1]=mix*0.5;//right channel - output[0]=(bassout+delayout)/2;//sum output - output[1]=(bassout+delayout)/2; + // This just sends note-off messages. + for (int i=0; i<6; i++) { + ADSR[i].trigger=0; + } -}
\ No newline at end of file +} |