static int make_Modal4(CSOUND *csound,
Modal4 *m, MYFLT *ifn, MYFLT vgain, MYFLT vrate)
{
FUNC *ftp;
if (LIKELY((ftp = csound->FTnp2Find(csound,ifn)) != NULL))
m->vibr = ftp;
else { /* Expect sine wave */
csound->ErrorMsg(csound, Str("No table for Modal4 case"));
return NOTOK;
}
make_Envelope(&m->envelope);
/* We do not make the excitation wave here yet, */
/* because we do not know what it's going to be. */
make_BiQuad(&m->filters[0]);
make_BiQuad(&m->filters[1]);
make_BiQuad(&m->filters[2]);
make_BiQuad(&m->filters[3]);
make_OnePole(&m->onepole);
m->v_rate = vrate; /* 6.0; */
m->vibrGain = vgain; /* 0.05; */
/* m->directGain = 0.0; */
m->masterGain = FL(1.0);
/* m->baseFreq = 440.0; */
/* Modal4_setRatioAndReson(m, 0, 1.00, 0.9997); */ /* Set some */
/* Modal4_setRatioAndReson(m, 1, 1.30, 0.9997); */ /* silly */
/* Modal4_setRatioAndReson(m, 2, 1.77, 0.9997); */ /* default */
/* Modal4_setRatioAndReson(m, 3, 2.37, 0.9997); */ /* values here */
/* Modal4_setFiltGain(m, 0, 0.01); */
/* Modal4_setFiltGain(m, 1, 0.01); */
/* Modal4_setFiltGain(m, 2, 0.01); */
/* Modal4_setFiltGain(m, 3, 0.01); */
/* OnePole_clear(&m->onepole); */
BiQuad_clear(&m->filters[0]);
BiQuad_clear(&m->filters[1]);
BiQuad_clear(&m->filters[2]);
BiQuad_clear(&m->filters[3]);
BiQuad_setEqualGainZeroes(m->filters[0]);
BiQuad_setEqualGainZeroes(m->filters[1]);
BiQuad_setEqualGainZeroes(m->filters[2]);
BiQuad_setEqualGainZeroes(m->filters[3]);
/* stickHardness = 0.5; */
/* strikePosition = 0.561; */
return OK;
}
static void tuneBandPasses(t_bowedbar *x)
{
long i;
for(i=0; i<x->NR_MODES; i++)
{
x->R = 1 - 6.28318530718 * x->x_freq * x->modes[i] / x->srate / 2.0;
BiQuad_setFreqAndReson(&x->bandpass_[i], x->x_freq * x->modes[i], x->R, x->srate);
BiQuad_setEqualGainZeroes(&x->bandpass_[i]);
BiQuad_setGain(&x->bandpass_[i], (1.0-x->R*x->R)/2.0);
x->filtGain[i] = (1.0 - (x->R*x->R))/2.0;
x->coeffs[i][1] = -x->R * x->R;
x->coeffs[i][0] = 2.0 * x->R * cos(6.28318530718 * x->x_freq * x->modes[i] / x->srate);
DLineN_clear(&x->delay[i]); //(rand()) - 16384;
}
}
int bowedset(CSOUND *csound, BOWED *p)
{
int32 length;
FUNC *ftp;
MYFLT amp = (*p->amp)*AMP_RSCALE; /* Normalise */
if (LIKELY((ftp = csound->FTnp2Find(csound, p->ifn)) != NULL)) p->vibr = ftp;
else { /* Expect sine wave */
return csound->InitError(csound, Str("No table for wgbow vibrato"));
}
if (*p->lowestFreq>=FL(0.0)) { /* If no init skip */
if (*p->lowestFreq!=FL(0.0)) {
length = (int32) (CS_ESR / *p->lowestFreq + FL(1.0));
p->limit = *p->lowestFreq;
}
else if (*p->frequency!=FL(0.0)) {
length = (int32) (CS_ESR / *p->frequency + FL(1.0));
p->limit = *p->frequency;
}
else {
csound->Warning(csound, Str("unknown lowest frequency for bowed string "
"-- assuming 50Hz\n"));
length = (int32) (CS_ESR / FL(50.0) + FL(1.0));
p->limit = FL(50.0);
}
make_DLineL(csound, &p->neckDelay, length);
length = length >> 1; /* Unsure about this; seems correct in later code */
make_DLineL(csound, &p->bridgeDelay, length);
/* p->bowTabl.offSet = FL(0.0);*/
/* offset is a bias, really not needed unless */
/* friction is different in each direction */
/* p->bowTabl.slope contrls width of friction pulse, related to bowForce */
p->bowTabl.slope = FL(3.0);
make_OnePole(&p->reflFilt);
make_BiQuad(&p->bodyFilt);
make_ADSR(&p->adsr);
DLineL_setDelay(&p->neckDelay, FL(100.0));
DLineL_setDelay(&p->bridgeDelay, FL(29.0));
OnePole_setPole(&p->reflFilt, FL(0.6) - (FL(0.1) * RATE_NORM));
OnePole_setGain(&p->reflFilt, FL(0.95));
BiQuad_setFreqAndReson(p->bodyFilt, FL(500.0), FL(0.85));
BiQuad_setEqualGainZeroes(p->bodyFilt);
BiQuad_setGain(p->bodyFilt, FL(0.2));
ADSR_setAllTimes(csound, &p->adsr, FL(0.02), FL(0.005), FL(0.9), FL(0.01));
/* ADSR_setAll(&p->adsr, 0.002f,0.01f,0.9f,0.01f); */
p->adsr.target = FL(1.0);
p->adsr.rate = p->adsr.attackRate;
p->adsr.state = ATTACK;
p->maxVelocity = FL(0.03) + (FL(0.2) * amp);
p->lastpress = FL(0.0); /* Set unknown state */
p->lastfreq = FL(0.0);
p->lastbeta = FL(0.0); /* Remember states */
p->lastamp = amp;
}
return OK;
}
int bowedbar(CSOUND *csound, BOWEDBAR *p)
{
MYFLT *ar = p->ar;
uint32_t offset = p->h.insdshead->ksmps_offset;
uint32_t early = p->h.insdshead->ksmps_no_end;
uint32_t n, nsmps = CS_KSMPS;
MYFLT amp = (*p->amp)*AMP_RSCALE; /* Normalise */
int32 k;
int i;
MYFLT maxVelocity;
MYFLT integration_const = *p->integration_const;
if (p->lastpress != *p->bowPress)
p->bowTabl.slope = p->lastpress = *p->bowPress;
if (p->freq != *p->frequency) {
p->freq = *p->frequency;
if (p->freq > FL(1568.0)) p->freq = FL(1568.0);
p->length = (int)(CS_ESR/p->freq);
p->nr_modes = NR_MODES; /* reset for frequency shift */
for (i = 0; i<NR_MODES; i++) {
if ((int)(p->length/p->modes[i]) > 4)
DLineN_setDelay(csound, &p->delay[i], (int)(p->length/p->modes[i]));
else {
p->nr_modes = i;
break;
}
}
if (p->nr_modes==0)
return csound->InitError(csound,
Str("Bowedbar: cannot have zero modes\n"));
for (i=0; i<p->nr_modes; i++) {
MYFLT R = FL(1.0) - p->freq * p->modes[i] * csound->pidsr;
BiQuad_clear(&p->bandpass[i]);
BiQuad_setFreqAndReson(p->bandpass[i], p->freq * p->modes[i], R);
BiQuad_setEqualGainZeroes(p->bandpass[i]);
BiQuad_setGain(p->bandpass[i], (FL(1.0)-R*R)*FL(0.5));
}
}
/* Bow position as well */
if (*p->position != p->lastpos) {
MYFLT temp2 = *p->position * PI_F;
p->gains[0] = FABS(SIN(temp2 * FL(0.5))) /* * pow(0.9,0))*/;
p->gains[1] = FABS(SIN(temp2) * FL(0.9));
p->gains[2] = FABS(SIN(temp2 * FL(1.5)) * FL(0.9)*FL(0.9));
p->gains[3] = FABS(SIN(temp2 * FL(2.0)) * FL(0.9)*FL(0.9)*FL(0.9));
p->lastpos = *p->position;
}
if (*p->bowposition != p->lastBowPos) { /* Not sure what this control is? */
p->bowTarg += FL(0.02) * (*p->bowposition - p->lastBowPos);
p->lastBowPos = *p->bowposition;
ADSR_setTarget(csound, &p->adsr, p->lastBowPos);
p->lastBowPos = *p->bowposition;
}
if (p->kloop>0 && p->h.insdshead->relesing) p->kloop=1;
if ((--p->kloop) == 0) {
ADSR_setReleaseRate(csound, &p->adsr, (FL(1.0) - amp) * FL(0.005));
p->adsr.target = FL(0.0);
p->adsr.rate = p->adsr.releaseRate;
p->adsr.state = RELEASE;
}
maxVelocity = FL(0.03) + (FL(0.5) * amp);
if (UNLIKELY(offset)) memset(ar, '\0', offset*sizeof(MYFLT));
if (UNLIKELY(early)) {
nsmps -= early;
memset(&ar[nsmps], '\0', early*sizeof(MYFLT));
}
for (n=offset; n<nsmps; n++) {
MYFLT data = FL(0.0);
MYFLT input = FL(0.0);
if (integration_const == FL(0.0))
p->velinput = FL(0.0);
else
p->velinput = integration_const * p->velinput;
for (k=0; k<p->nr_modes; k++) {
p->velinput += *p->GAIN * p->delay[k].lastOutput;
}
if (*p->trackVel) {
p->bowvel *= FL(0.9995);
p->bowvel += p->bowTarg;
p->bowTarg *= FL(0.995);
}
else
p->bowvel = ADSR_tick(&p->adsr)*maxVelocity;
input = p->bowvel - p->velinput;
input = input * BowTabl_lookup(csound, &p->bowTabl, input);
input = input/(MYFLT)p->nr_modes;
for (k=0; k<p->nr_modes; k++) {
BiQuad_tick(&p->bandpass[k],
input*p->gains[k] + *p->GAIN * p->delay[k].lastOutput);
DLineN_tick(&p->delay[k], p->bandpass[k].lastOutput);
data += p->bandpass[k].lastOutput;
}
ar[n] = data * AMP_SCALE * FL(20.0); /* 20 is an experimental value */
}
return OK;
}
