429 |
return cutoff; |
return cutoff; |
430 |
} |
} |
431 |
|
|
432 |
|
/// Returns true for GigaStudio's original filter types. |
433 |
|
constexpr bool isGStFilterType(::gig::vcf_type_t type) { |
434 |
|
return type == ::gig::vcf_type_lowpass || |
435 |
|
type == ::gig::vcf_type_lowpassturbo || |
436 |
|
type == ::gig::vcf_type_bandpass || |
437 |
|
type == ::gig::vcf_type_highpass || |
438 |
|
type == ::gig::vcf_type_bandreject; |
439 |
|
} |
440 |
|
|
441 |
float Voice::CalculateFinalCutoff(float cutoffBase) { |
float Voice::CalculateFinalCutoff(float cutoffBase) { |
442 |
int cvalue; |
int cvalue; |
443 |
if (VCFCutoffCtrl.controller) { |
if (VCFCutoffCtrl.controller) { |
452 |
float fco = cutoffBase * float(cvalue); |
float fco = cutoffBase * float(cvalue); |
453 |
if (fco > 127.0f) fco = 127.0f; |
if (fco > 127.0f) fco = 127.0f; |
454 |
|
|
455 |
|
// the filter implementations of the original GSt filter types take an |
456 |
|
// abstract cutoff parameter range of 0..127, ... |
457 |
|
if (isGStFilterType(pRegion->VCFType)) |
458 |
|
return fco; |
459 |
|
|
460 |
|
// ... whereas our own filter types take a cutoff parameter in Hz, so |
461 |
|
// remap here 0 .. 127 [lin] -> 21 Hz .. 18 kHz [log4] (center @2.2 kHz) |
462 |
|
fco = (fco + 29.f) / (127.f + 29.f); |
463 |
|
fco = fco * fco * fco * fco * 18000.f; |
464 |
|
if (fco > 0.49f * pEngine->SampleRate) |
465 |
|
fco = 0.49f * pEngine->SampleRate; |
466 |
return fco; |
return fco; |
467 |
} |
} |
468 |
|
|