mirror of
https://github.com/thestk/stk
synced 2026-01-12 20:41:52 +00:00
130 lines
3.4 KiB
C++
130 lines
3.4 KiB
C++
/******************************************/
|
|
/* Waveguide Brass Instrument Model ala */
|
|
/* Cook (TBone, HosePlayer) */
|
|
/* by Perry R. Cook, 1995-96 */
|
|
/* */
|
|
/* This is a waveguide model, and thus */
|
|
/* relates to various Stanford Univ. */
|
|
/* and possibly Yamaha and other patents.*/
|
|
/* */
|
|
/* Controls: CONTROL1 = lipTension */
|
|
/* CONTROL2 = slideLength */
|
|
/* CONTROL3 = vibFreq */
|
|
/* MOD_WHEEL= vibAmt */
|
|
/******************************************/
|
|
|
|
#include "Brass.h"
|
|
|
|
Brass :: Brass(MY_FLOAT lowestFreq)
|
|
{
|
|
length = (long) (SRATE / lowestFreq + 1);
|
|
delayLine = new DLineA(length);
|
|
lipFilter = new LipFilt;
|
|
dcBlock = new DCBlock;
|
|
adsr = new ADSR;
|
|
adsr->setAll(0.02, 0.05, 1.0, 0.001);
|
|
vibr = new RawLoop("rawwaves/sinewave.raw");
|
|
this->clear();
|
|
|
|
vibr->normalize();
|
|
vibr->setFreq(6.137);
|
|
vibrGain = 0.05; /* breath periodic vibrato component */
|
|
}
|
|
|
|
Brass :: ~Brass()
|
|
{
|
|
delete delayLine;
|
|
delete lipFilter;
|
|
delete dcBlock;
|
|
delete adsr;
|
|
delete vibr;
|
|
}
|
|
|
|
void Brass :: clear()
|
|
{
|
|
delayLine->clear();
|
|
lipFilter->clear();
|
|
dcBlock->clear();
|
|
/* adsr->reset(); */
|
|
}
|
|
|
|
void Brass :: setFreq(MY_FLOAT frequency)
|
|
{
|
|
slideTarget = ((MY_FLOAT) SRATE / frequency * 2.0) + 3.0;
|
|
/* fudge correction for filter delays */
|
|
delayLine->setDelay(slideTarget); /* we'll play a harmonic */
|
|
lipTarget = frequency;
|
|
lipFilter->setFreq(frequency);
|
|
}
|
|
|
|
void Brass :: setLip(MY_FLOAT frequency)
|
|
{
|
|
lipFilter->setFreq(frequency);
|
|
}
|
|
|
|
void Brass :: startBlowing(MY_FLOAT amplitude,MY_FLOAT rate)
|
|
{
|
|
adsr->setAttackRate(rate);
|
|
maxPressure = amplitude;
|
|
adsr->keyOn();
|
|
}
|
|
|
|
void Brass :: stopBlowing(MY_FLOAT rate)
|
|
{
|
|
adsr->setReleaseRate(rate);
|
|
adsr->keyOff();
|
|
}
|
|
|
|
void Brass :: noteOn(MY_FLOAT freq, MY_FLOAT amp)
|
|
{
|
|
this->setFreq(freq);
|
|
this->startBlowing(amp, amp * 0.001);
|
|
#if defined(_debug_)
|
|
printf("Brass : NoteOn: Freq=%lf Amp=%lf\n",freq,amp);
|
|
#endif
|
|
}
|
|
|
|
void Brass :: noteOff(MY_FLOAT amp)
|
|
{
|
|
this->stopBlowing(amp * 0.005);
|
|
#if defined(_debug_)
|
|
printf("Brass : NoteOff: Amp=%lf\n",amp);
|
|
#endif
|
|
}
|
|
|
|
MY_FLOAT Brass :: tick()
|
|
{
|
|
MY_FLOAT breathPressure;
|
|
|
|
breathPressure = maxPressure * adsr->tick();
|
|
breathPressure += vibrGain * vibr->tick();
|
|
lastOutput = delayLine->tick( /* bore delay */
|
|
dcBlock->tick( /* block DC */
|
|
lipFilter->tick(0.3 * breathPressure, /* mouth input */
|
|
0.85 * delayLine->lastOut()))); /* and bore reflection */
|
|
return lastOutput;
|
|
}
|
|
|
|
void Brass :: controlChange(int number, MY_FLOAT value)
|
|
{
|
|
MY_FLOAT temp;
|
|
#if defined(_debug_)
|
|
printf("Brass : ControlChange: Number=%i Value=%f\n",number,value);
|
|
#endif
|
|
if (number == MIDI_control1) {
|
|
temp = lipTarget * pow(4.0,(2.0*value*NORM_7) - 1.0);
|
|
this->setLip(temp);
|
|
}
|
|
else if (number == MIDI_control2)
|
|
delayLine->setDelay(slideTarget * (0.5 + (value * NORM_7)));
|
|
else if (number == MIDI_control3)
|
|
vibr->setFreq((value * NORM_7 * 12.0));
|
|
else if (number == MIDI_mod_wheel)
|
|
vibrGain = (value * NORM_7 * 0.4);
|
|
else if (number == MIDI_after_touch)
|
|
adsr->setTarget(value * NORM_7);
|
|
else {
|
|
printf("Brass : Undefined Control Number!!\n");
|
|
}
|
|
}
|