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Provide option to shift formant independently of pitch

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This commit is contained in:
Chris Cannam
2022-06-13 10:39:13 +01:00
parent 182e2b0e3b
commit c7e4d9eb07
4 changed files with 70 additions and 1 deletions
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17
src/finer/R3StretcherImpl.cpp
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@@ -35,6 +35,7 @@ R3StretcherImpl::R3StretcherImpl(Parameters parameters,
m_parameters(parameters),
m_timeRatio(initialTimeRatio),
m_pitchScale(initialPitchScale),
m_formantScale(0.0),
m_guide(Guide::Parameters(m_parameters.sampleRate, parameters.logger)),
m_guideConfiguration(m_guide.getConfiguration()),
m_channelAssembly(m_parameters.channels),
@@ -173,6 +174,12 @@ R3StretcherImpl::setPitchScale(double scale)
calculateHop();
}
void
R3StretcherImpl::setFormantScale(double scale)
{
m_formantScale = scale;
}
void
R3StretcherImpl::setFormantOption(RubberBandStretcher::Options options)
{
@@ -233,6 +240,12 @@ R3StretcherImpl::getPitchScale() const
return m_pitchScale;
}
double
R3StretcherImpl::getFormantScale() const
{
return m_formantScale;
}
size_t
R3StretcherImpl::getLatency() const
{
@@ -777,7 +790,9 @@ R3StretcherImpl::adjustFormant(int c)
int highBin = int(floor(fftSize * 10000.0 / m_parameters.sampleRate));
double targetFactor = double(cd->formant->fftSize) / double(fftSize);
double sourceFactor = targetFactor * m_pitchScale;
double formantScale = m_formantScale;
if (formantScale == 0.0) formantScale = 1.0 / m_pitchScale;
double sourceFactor = targetFactor / formantScale;
double maxRatio = 60.0;
double minRatio = 1.0 / maxRatio;