mirror of
https://github.com/thestk/stk
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81 lines
1.7 KiB
C++
81 lines
1.7 KiB
C++
/********************************************/
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/* Two oscillator instrument for use */
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/* with MUS151 Psychoacoustics course. */
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/* by Gary P. Scavone & Oded Ben-Tal, 1998 */
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/* CCRMA, Stanford Unviversity */
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/********************************************/
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#include "TwoOsc.h"
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TwoOsc :: TwoOsc()
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{
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int i;
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envelope = new Envelope; /* Envelope to avoid clicks */
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// Concatenate the STK RAWWAVE_PATH to the rawwave file
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char file[128];
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strcpy(file, RAWWAVE_PATH);
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for (i=0; i<2; i++) {
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osc[i] = new RawWvIn(strcat(file,"rawwaves/sinewave.raw"),"looping");
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strcpy(file, RAWWAVE_PATH);
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osc[i]->normalize();
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osc[i]->setFreq((MY_FLOAT) 200.0);
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amps[i] = 0.2;
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}
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lastOutput = 0;
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}
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TwoOsc :: ~TwoOsc()
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{
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int i;
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for (i=0; i<2; i++) delete osc[i];
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delete envelope;
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}
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void TwoOsc :: setFreq(int oscnum, MY_FLOAT frequency)
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{
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if (oscnum == 1) osc[0]->setFreq(frequency);
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else if (oscnum == 2) osc[1]->setFreq(frequency);
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}
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void TwoOsc :: setAmp(int oscnum, MY_FLOAT amp)
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{
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if (oscnum == 1) amps[0] = amp;
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else if (oscnum == 2) amps[1] = amp;
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}
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void TwoOsc :: noteOn(MY_FLOAT freq, MY_FLOAT amp)
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{
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envelope->keyOn();
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}
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void TwoOsc :: noteOff(MY_FLOAT amp)
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{
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envelope->keyOff();
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}
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MY_FLOAT TwoOsc :: tick()
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{
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lastOutput = 0.5 * envelope->tick() * (amps[0]*osc[0]->tick() + amps[1]*osc[1]->tick());
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return lastOutput;
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}
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void TwoOsc :: controlChange(int number, MY_FLOAT value)
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{
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switch (number) {
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case 20:
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osc[0]->setFreq(value);
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break;
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case 21:
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osc[1]->setFreq(value);
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break;
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case 22:
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amps[0] = value * NORM_7;
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break;
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case 23:
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amps[1] = value * NORM_7;
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break;
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}
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}
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