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https://github.com/thestk/stk
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Version 0.99
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164
DrumSynt.cpp
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164
DrumSynt.cpp
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/*******************************************/
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/* Master Class for Drum Synthesizer */
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/* by Perry R. Cook, 1995-96 */
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/* This instrument contains a bunch of */
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/* RawWvIn objects (Non-Interpolating, */
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/* 1 shot players), run through a bunch */
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/* of one-pole filters. You can specify */
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/* the maximum Polyphony (maximum number */
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/* of simultaneous voices) in a #define */
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/* in the .h file. */
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/*******************************************/
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#include "DrumSynt.h"
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#include <string.h>
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char waveNames[DRUM_NUMWAVES][16] = {
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"bass.raw",
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"snar.raw",
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"tomlow.raw",
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"tommid.raw",
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"tomhi.raw",
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"hat.raw",
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"ride.raw",
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"crash.raw",
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"cowbell.raw",
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"tamb.raw"
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};
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DrumSynt :: DrumSynt() : Object()
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{
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int i;
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/* char temp[64]; */
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/* for (i=0;i<DRUM_NUMWAVES;i++) { */
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/* strcpy(temp,"rawwaves/drumwavs/"); */
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/* strcat(temp,waveNames[i]); */
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/* waves[i] = new RawWvIn(temp); */
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/* waves[i]->finish(); */
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/* waves[i]->normalize(0.2); */
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/* } */
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for (i=0;i<DRUM_POLYPHONY;i++) {
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filters[i] = new OnePole;
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sounding[i] = -1;
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/* filtSounding[i] = -1; */
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}
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numSounding = 0; /* This counts the number */
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/* of sounding voices */
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}
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void DrumSynt :: noteOn(int noteNum, int vel)
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{
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int i,notDone;
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char tempString[64];
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RawWvIn *tempWv;
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OnePole *tempFilt;
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printf("NoteOn: %s vel=%i\n",waveNames[noteNum],vel);
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notDone = -1;
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for (i=0;i<DRUM_POLYPHONY;i++) { /* Check first to see */
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if (sounding[i] == noteNum) notDone = i; /* if there's already */
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} /* one like this sounding */
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if (notDone<0) { /* If not, then */
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if (numSounding == DRUM_POLYPHONY) { /* If we're already */
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delete waves[0]; /* at max polyphony, */
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filters[0]->clear(); /* then */
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tempWv = waves[0];
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tempFilt = filters[0];
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for (i=0;i<DRUM_POLYPHONY-1;i++) { /* preempt oldest */
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waves[i] = waves[i+1]; /* oldest voice and */
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filters[i] = filters[i+1]; /* ripple all down */
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}
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waves[DRUM_POLYPHONY-1] = tempWv;
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filters[DRUM_POLYPHONY-1] = tempFilt;
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}
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else {
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numSounding += 1; /* otherwise just add one */
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}
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sounding[numSounding-1] = noteNum; /* allocate new wave */
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strcpy(tempString,"rawwaves/drumwavs/");
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strcat(tempString,waveNames[noteNum]);
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waves[numSounding-1] = new RawWvIn(tempString);
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waves[numSounding-1]->normalize(0.2);
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filters[numSounding-1]->setPole(0.999 - (vel / 32.0));
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filters[numSounding-1]->setGain(vel / 128.0);
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}
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else {
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waves[notDone]->reset();
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filters[notDone]->setPole(0.999 - (vel / 32.0));
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filters[notDone]->setGain(vel / 128.0);
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}
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printf("Number Sounding = %i\n",numSounding);
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for (i=0;i<numSounding;i++) printf(" %i ",sounding[i]);
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printf("\n");
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}
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MY_FLOAT DrumSynt :: tick()
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{
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int i, j, notDone;
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MY_FLOAT output;
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OnePole *tempFilt;
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i = 0;
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notDone = 1;
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output = 0.0;
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if (numSounding == 0) notDone = 0;
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while (notDone && (i < numSounding)) {
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output += waves[i]->lastOut();
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if (waves[i]->informTick() == 1) {
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printf("Wave %i %i down here\n",i,sounding[i]);
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delete waves[i];
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tempFilt = filters[i];
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for (j=i;j<numSounding-1;j++) {
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sounding[j] = sounding[j+1];
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waves[j] = waves[j+1];
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filters[j] = filters[j+1];
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}
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filters[j] = tempFilt;
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filters[j]->clear();
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sounding[j] = -1;
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numSounding -= 1;
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if (numSounding == 0) notDone = 0;
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i -= 1;
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}
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i++;
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}
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return output;
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}
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/************** Test Main Program *********************/
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#include "miditabl.h"
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#include "RawWvOut.h"
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#include "Reverb.h"
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#include "Noise.h"
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int main()
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{
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long i,j;
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DrumSynt instrument;
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RawWvOut output("test.snd");
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Reverb reverb(2137);
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Noise noise;
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for (j=0;j<100;j++) {
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i = (int) (fabs(noise.tick()) * DRUM_NUMWAVES);
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instrument.noteOn(i,127);
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for (i=0;i<2000;i++) output.tick(reverb.tick(instrument.tick()));
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}
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for (i=0;i<22000;i++) output.tick(reverb.tick(instrument.tick()));
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}
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