mirror of
https://github.com/thestk/stk
synced 2026-01-16 14:21:53 +00:00
Version 4.0
This commit is contained in:
Gary Scavone
committed by
Stephen Sinclair
Stephen Sinclair
parent
3f126af4e5
commit
81475b04c5
182
src/Brass.cpp
182
src/Brass.cpp
@@ -1,40 +1,53 @@
|
||||
/******************************************/
|
||||
/* 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 */
|
||||
/******************************************/
|
||||
/***************************************************/
|
||||
/*! \class Brass
|
||||
\brief STK simple brass instrument class.
|
||||
|
||||
This class implements a simple brass instrument
|
||||
waveguide model, a la Cook (TBone, HosePlayer).
|
||||
|
||||
This is a digital waveguide model, making its
|
||||
use possibly subject to patents held by
|
||||
Stanford University, Yamaha, and others.
|
||||
|
||||
Control Change Numbers:
|
||||
- Lip Tension = 2
|
||||
- Slide Length = 4
|
||||
- Vibrato Frequency = 11
|
||||
- Vibrato Gain = 1
|
||||
- Volume = 128
|
||||
|
||||
by Perry R. Cook and Gary P. Scavone, 1995 - 2002.
|
||||
*/
|
||||
/***************************************************/
|
||||
|
||||
#include "Brass.h"
|
||||
#include "SKINI11.msg"
|
||||
#include "SKINI.msg"
|
||||
#include <string.h>
|
||||
#include <math.h>
|
||||
|
||||
Brass :: Brass(MY_FLOAT lowestFreq)
|
||||
Brass :: Brass(MY_FLOAT lowestFrequency)
|
||||
{
|
||||
length = (long) (SRATE / lowestFreq + 1);
|
||||
delayLine = new DLineA(length);
|
||||
lipFilter = new LipFilt;
|
||||
dcBlock = new DCBlock;
|
||||
length = (long) (Stk::sampleRate() / lowestFrequency + 1);
|
||||
delayLine = new DelayA( 0.5 * length, length );
|
||||
|
||||
lipFilter = new BiQuad();
|
||||
lipFilter->setGain( 0.03 );
|
||||
dcBlock = new PoleZero();
|
||||
dcBlock->setBlockZero();
|
||||
|
||||
adsr = new ADSR;
|
||||
adsr->setAllTimes((MY_FLOAT) 0.005, (MY_FLOAT) 0.001, (MY_FLOAT) 1.0, (MY_FLOAT) 0.010);
|
||||
adsr->setAllTimes( 0.005, 0.001, 1.0, 0.010);
|
||||
|
||||
// Concatenate the STK RAWWAVE_PATH to the rawwave file
|
||||
char file[128];
|
||||
strcpy(file, RAWWAVE_PATH);
|
||||
vibr = new RawWvIn(strcat(file,"rawwaves/sinewave.raw"),"looping");
|
||||
vibrato = new WaveLoop( strcat(file,"rawwaves/sinewave.raw"), TRUE );
|
||||
vibrato->setFrequency( 6.137 );
|
||||
vibratoGain = 0.0;
|
||||
|
||||
this->clear();
|
||||
|
||||
vibr->setFreq((MY_FLOAT) 6.137);
|
||||
vibrGain = (MY_FLOAT) 0.05; /* breath periodic vibrato component */
|
||||
|
||||
maxPressure = (MY_FLOAT) 0.0;
|
||||
lipTarget = 0.0;
|
||||
}
|
||||
|
||||
Brass :: ~Brass()
|
||||
@@ -43,7 +56,7 @@ Brass :: ~Brass()
|
||||
delete lipFilter;
|
||||
delete dcBlock;
|
||||
delete adsr;
|
||||
delete vibr;
|
||||
delete vibrato;
|
||||
}
|
||||
|
||||
void Brass :: clear()
|
||||
@@ -53,21 +66,34 @@ void Brass :: clear()
|
||||
dcBlock->clear();
|
||||
}
|
||||
|
||||
void Brass :: setFreq(MY_FLOAT frequency)
|
||||
void Brass :: setFrequency(MY_FLOAT frequency)
|
||||
{
|
||||
slideTarget = (SRATE / frequency * (MY_FLOAT) 2.0) + (MY_FLOAT) 3.0;
|
||||
/* fudge correction for filter delays */
|
||||
delayLine->setDelay(slideTarget); /* we'll play a harmonic */
|
||||
lipTarget = frequency;
|
||||
lipFilter->setFreq(frequency);
|
||||
MY_FLOAT freakency = frequency;
|
||||
if ( frequency <= 0.0 ) {
|
||||
cerr << "Brass: setFrequency parameter is less than or equal to zero!" << endl;
|
||||
freakency = 220.0;
|
||||
}
|
||||
|
||||
// Fudge correction for filter delays.
|
||||
slideTarget = (Stk::sampleRate() / freakency * 2.0) + 3.0;
|
||||
delayLine->setDelay(slideTarget); // play a harmonic
|
||||
|
||||
lipTarget = freakency;
|
||||
lipFilter->setResonance( freakency, 0.997 );
|
||||
}
|
||||
|
||||
void Brass :: setLip(MY_FLOAT frequency)
|
||||
{
|
||||
lipFilter->setFreq(frequency);
|
||||
MY_FLOAT freakency = frequency;
|
||||
if ( frequency <= 0.0 ) {
|
||||
cerr << "Brass: setLip parameter is less than or equal to zero!" << endl;
|
||||
freakency = 220.0;
|
||||
}
|
||||
|
||||
lipFilter->setResonance( freakency, 0.997 );
|
||||
}
|
||||
|
||||
void Brass :: startBlowing(MY_FLOAT amplitude,MY_FLOAT rate)
|
||||
void Brass :: startBlowing(MY_FLOAT amplitude, MY_FLOAT rate)
|
||||
{
|
||||
adsr->setAttackRate(rate);
|
||||
maxPressure = amplitude;
|
||||
@@ -80,55 +106,71 @@ void Brass :: stopBlowing(MY_FLOAT rate)
|
||||
adsr->keyOff();
|
||||
}
|
||||
|
||||
void Brass :: noteOn(MY_FLOAT freq, MY_FLOAT amp)
|
||||
void Brass :: noteOn(MY_FLOAT frequency, MY_FLOAT amplitude)
|
||||
{
|
||||
this->setFreq(freq);
|
||||
this->startBlowing(amp, amp * (MY_FLOAT) 0.001);
|
||||
#if defined(_debug_)
|
||||
printf("Brass : NoteOn: Freq=%lf Amp=%lf\n",freq,amp);
|
||||
#endif
|
||||
setFrequency(frequency);
|
||||
this->startBlowing(amplitude, amplitude * 0.001);
|
||||
|
||||
#if defined(_STK_DEBUG_)
|
||||
cerr << "Brass: NoteOn frequency = " << frequency << ", amplitude = " << amplitude << endl;
|
||||
#endif
|
||||
}
|
||||
|
||||
void Brass :: noteOff(MY_FLOAT amp)
|
||||
void Brass :: noteOff(MY_FLOAT amplitude)
|
||||
{
|
||||
this->stopBlowing(amp * (MY_FLOAT) 0.005);
|
||||
#if defined(_debug_)
|
||||
printf("Brass : NoteOff: Amp=%lf\n",amp);
|
||||
#endif
|
||||
this->stopBlowing(amplitude * 0.005);
|
||||
|
||||
#if defined(_STK_DEBUG_)
|
||||
cerr << "Brass: NoteOff amplitude = " << amplitude << endl;
|
||||
#endif
|
||||
}
|
||||
|
||||
MY_FLOAT Brass :: tick()
|
||||
{
|
||||
MY_FLOAT breathPressure;
|
||||
MY_FLOAT breathPressure = maxPressure * adsr->tick();
|
||||
breathPressure += vibratoGain * vibrato->tick();
|
||||
|
||||
MY_FLOAT mouthPressure = 0.3 * breathPressure;
|
||||
MY_FLOAT borePressure = 0.85 * delayLine->lastOut();
|
||||
MY_FLOAT deltaPressure = mouthPressure - borePressure; // Differential pressure.
|
||||
deltaPressure = lipFilter->tick( deltaPressure ); // Force - > position.
|
||||
deltaPressure *= deltaPressure; // Basic position to area mapping.
|
||||
if ( deltaPressure > 1.0 ) deltaPressure = 1.0; // Non-linear saturation.
|
||||
// The following input scattering assumes the mouthPressure = area.
|
||||
lastOutput = deltaPressure * mouthPressure + ( 1.0 - deltaPressure) * borePressure;
|
||||
lastOutput = delayLine->tick( dcBlock->tick( lastOutput ) );
|
||||
|
||||
breathPressure = maxPressure * adsr->tick();
|
||||
breathPressure += vibrGain * vibr->tick();
|
||||
lastOutput = delayLine->tick( /* bore delay */
|
||||
dcBlock->tick( /* block DC */
|
||||
lipFilter->tick((MY_FLOAT) 0.3 * breathPressure, /* mouth input */
|
||||
(MY_FLOAT) 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 == __SK_LipTension_) {
|
||||
temp = lipTarget * (MY_FLOAT) pow(4.0,(2.0*value*NORM_7) - 1.0);
|
||||
MY_FLOAT norm = value * ONE_OVER_128;
|
||||
if ( norm < 0 ) {
|
||||
norm = 0.0;
|
||||
cerr << "Brass: Control value less than zero!" << endl;
|
||||
}
|
||||
else if ( norm > 1.0 ) {
|
||||
norm = 1.0;
|
||||
cerr << "Brass: Control value greater than 128.0!" << endl;
|
||||
}
|
||||
|
||||
if (number == __SK_LipTension_) { // 2
|
||||
MY_FLOAT temp = lipTarget * pow( 4.0, (2.0 * norm) - 1.0 );
|
||||
this->setLip(temp);
|
||||
}
|
||||
else if (number == __SK_SlideLength_)
|
||||
delayLine->setDelay(slideTarget * ((MY_FLOAT) 0.5 + (value * NORM_7)));
|
||||
else if (number == __SK_ModFrequency_)
|
||||
vibr->setFreq((value * NORM_7 * (MY_FLOAT) 12.0));
|
||||
else if (number == __SK_ModWheel_ )
|
||||
vibrGain = (value * NORM_7 * (MY_FLOAT) 0.4);
|
||||
else if (number == __SK_AfterTouch_Cont_)
|
||||
adsr->setTarget(value * NORM_7);
|
||||
else {
|
||||
printf("Brass : Undefined Control Number!!\n");
|
||||
}
|
||||
else if (number == __SK_SlideLength_) // 4
|
||||
delayLine->setDelay( slideTarget * (0.5 + norm) );
|
||||
else if (number == __SK_ModFrequency_) // 11
|
||||
vibrato->setFrequency( norm * 12.0 );
|
||||
else if (number == __SK_ModWheel_ ) // 1
|
||||
vibratoGain = norm * 0.4;
|
||||
else if (number == __SK_AfterTouch_Cont_) // 128
|
||||
adsr->setTarget( norm );
|
||||
else
|
||||
cerr << "Brass: Undefined Control Number (" << number << ")!!" << endl;
|
||||
|
||||
#if defined(_STK_DEBUG_)
|
||||
cerr << "Brass: controlChange number = " << number << ", value = " << value << endl;
|
||||
#endif
|
||||
}
|
||||
|
||||
Reference in New Issue
Block a user