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; }