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NFM demod: damper discriminator output amplitude by 2 to limit audio loudness

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This commit is contained in:
f4exb 2020-11-05 13:41:12 +01:00
parent 41f0fec4f6
commit 3377fb084b
1 changed files with 3 additions and 3 deletions
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6
plugins/channelrx/demodnfm/nfmdemodsink.cpp
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@ -59,7 +59,7 @@ NFMDemodSink::NFMDemodSink() :
{ {
m_agcLevel = 1.0; m_agcLevel = 1.0;
m_audioBuffer.resize(1<<16); m_audioBuffer.resize(1<<16);
m_phaseDiscri.setFMScaling(1.0f); m_phaseDiscri.setFMScaling(0.5f);
applySettings(m_settings, true); applySettings(m_settings, true);
applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true); applyChannelSettings(m_channelSampleRate, m_channelFrequencyOffset, true);
@ -263,7 +263,7 @@ void NFMDemodSink::applySettings(const NFMDemodSettings& settings, bool force)
if ((settings.m_fmDeviation != m_settings.m_fmDeviation) || force) if ((settings.m_fmDeviation != m_settings.m_fmDeviation) || force)
{ {
m_phaseDiscri.setFMScaling(m_audioSampleRate / static_cast<float>(settings.m_fmDeviation)); // integrate 4x factor m_phaseDiscri.setFMScaling((0.5f *m_audioSampleRate) / static_cast<float>(settings.m_fmDeviation)); // integrate 4x factor
} }
if ((settings.m_afBandwidth != m_settings.m_afBandwidth) || force) if ((settings.m_afBandwidth != m_settings.m_afBandwidth) || force)
@ -327,7 +327,7 @@ void NFMDemodSink::applyAudioSampleRate(unsigned int sampleRate)
m_afSquelch.setCoefficients(sampleRate/2000, 600, sampleRate, 200, 0, afSqTones); // 0.5ms test period, 300ms average span, audio SR, 100ms attack, no decay m_afSquelch.setCoefficients(sampleRate/2000, 600, sampleRate, 200, 0, afSqTones); // 0.5ms test period, 300ms average span, audio SR, 100ms attack, no decay
} }
m_phaseDiscri.setFMScaling(sampleRate / static_cast<float>(m_settings.m_fmDeviation)); m_phaseDiscri.setFMScaling((0.5f * sampleRate) / static_cast<float>(m_settings.m_fmDeviation));
m_audioFifo.setSize(sampleRate); m_audioFifo.setSize(sampleRate);
m_squelchDelayLine.resize(sampleRate/2); m_squelchDelayLine.resize(sampleRate/2);
m_interpolatorDistanceRemain = 0; m_interpolatorDistanceRemain = 0;