More peak controller changes:

Add treshold knob to peak controller
This causes the peak controller to react only when the measured peaks are above the set treshold
Might be useful for finetuning your sidechains

plugins/peak_controller_effect/peak_controller_effect.cpp

@@ -130,7 +130,9 @@ bool PeakControllerEffect::processAudioBuffer( sampleFrame * _buf,
 	}
 
 	float curRMS = sqrt_neg( sum / _frames );
+	const float tres = c.m_tresholdModel.value();
 	const float amount = c.m_amountModel.value() * c.m_amountMultModel.value();
+	curRMS = qAbs( curRMS ) < tres ? 0.0f : curRMS;
 	m_lastSample = qBound( 0.0f, c.m_baseModel.value() + amount * curRMS, 1.0f );
 
 	return isRunning();

plugins/peak_controller_effect/peak_controller_effect_control_dialog.cpp

@@ -46,7 +46,7 @@ PeakControllerEffectControlDialog::PeakControllerEffectControlDialog(
 	setPalette( pal );
 
 	QVBoxLayout * tl = new QVBoxLayout( this );
-	tl->setContentsMargins( 5, 30, 8, 8 );
+	tl->setContentsMargins( 5, 30, 5, 8 );
 
 	QHBoxLayout * l = new QHBoxLayout;
 	l->setSpacing( 4 );
@@ -74,12 +74,18 @@ PeakControllerEffectControlDialog::PeakControllerEffectControlDialog(
 	m_decayKnob->setLabel( tr( "DCAY" ) );
 	m_decayKnob->setModel( &_controls->m_decayModel );
 	m_decayKnob->setHintText( tr( "Release:" ) + " ", "" );
+
+	m_tresholdKnob = new knob( knobBright_26, this );
+	m_tresholdKnob->setLabel( tr( "TRES" ) );
+	m_tresholdKnob->setModel( &_controls->m_tresholdModel );
+	m_tresholdKnob->setHintText( tr( "Treshold:" ) + " ", "" );
 
 	l->addWidget( m_baseKnob );
 	l->addWidget( m_amountKnob );
 	l->addWidget( m_amountMultKnob );
 	l->addWidget( m_attackKnob );
 	l->addWidget( m_decayKnob );
+	l->addWidget( m_tresholdKnob );
 	l->addStretch(); // expand, so other widgets have minimum width
 	tl->addLayout( l );
 

plugins/peak_controller_effect/peak_controller_effect_control_dialog.h

@@ -48,6 +48,7 @@ class PeakControllerEffectControlDialog : public EffectControlDialog
 	knob * m_amountKnob;
 	knob * m_attackKnob;
 	knob * m_decayKnob;
+	knob * m_tresholdKnob;
 	ledCheckBox * m_muteLed;
 
 	ledCheckBox * m_absLed;

plugins/peak_controller_effect/peak_controller_effect_controls.cpp

@@ -41,6 +41,7 @@ PeakControllerEffectControls( PeakControllerEffect * _eff ) :
 	m_amountModel( 1.0, -1.0, 1.0, 0.005, this, tr( "Modulation amount" ) ),
 	m_attackModel( 0, 0, 0.999, 0.001, this, tr( "Attack" ) ),
 	m_decayModel( 0, 0, 0.999, 0.001, this, tr( "Release" ) ),
+	m_tresholdModel( 0, 0, 1.0, 0.001, this, tr( "Treshold" ) ),
 	m_muteModel( false, this, tr( "Mute output" ) ),
 	m_absModel( true, this, tr("Abs Value") ),
 	m_amountMultModel( 1.0, 0, 32, 0.2, this, tr("Amount Multiplicator") )
@@ -61,6 +62,8 @@ void PeakControllerEffectControls::loadSettings( const QDomElement & _this )
 
 	m_absModel.loadSettings( _this, "abs" );
 	m_amountMultModel.loadSettings( _this, "amountmult" );
+
+	m_tresholdModel.loadSettings( _this, "treshold" );
 
 	/*If the peak controller effect is NOT loaded from project,
 	 * m_effectId stored is useless.
@@ -102,6 +105,8 @@ void PeakControllerEffectControls::saveSettings( QDomDocument & _doc,
 
 	m_absModel.saveSettings( _doc,  _this, "abs" );
 	m_amountMultModel.saveSettings( _doc, _this, "amountmult" );
+
+	m_tresholdModel.saveSettings( _doc, _this, "treshold" );
 }
 
 

plugins/peak_controller_effect/peak_controller_effect_controls.h

@@ -65,6 +65,7 @@ class PeakControllerEffectControls : public EffectControls
 	FloatModel m_amountModel;
 	FloatModel m_attackModel;
 	FloatModel m_decayModel;
+	FloatModel m_tresholdModel;
 	BoolModel m_muteModel;
 	BoolModel m_absModel;
 	FloatModel m_amountMultModel;

src/core/PeakController.cpp

@@ -87,8 +87,8 @@ void PeakController::updateValueBuffer()
 	if( m_coeffNeedsUpdate )
 	{
 		const float ratio = 44100.0f / engine::mixer()->processingSampleRate();
-		m_attackCoeff = 1.0f - powf( 10.0f, -0.5f * ( 1.0f - m_peakEffect->attackModel()->value() ) * ratio );
-		m_decayCoeff = 1.0f -  powf( 10.0f, -0.5f * ( 1.0f - m_peakEffect->decayModel()->value()  ) * ratio );
+		m_attackCoeff = 1.0f - powf( 2.0f, -0.3f * ( 1.0f - m_peakEffect->attackModel()->value() ) * ratio );
+		m_decayCoeff = 1.0f -  powf( 2.0f, -0.3f * ( 1.0f - m_peakEffect->decayModel()->value()  ) * ratio );
 		m_coeffNeedsUpdate = false;
 	}