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LPF18.effect
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<effect>
<name>LPF18</name>
<enabled>true</enabled>
<numIns>2</numIns>
<numOuts>2</numOuts>
<code>if (<lpf18ON> == 1) then
kres = <lpf18_resonance>
kcofreq = <lpf18_frequency fine>+<lpf18_frequency coarse>
if <lpf18_distortion ON> == 1 then
kdist = <lpf18_distortion>
afilt1 lpf18 ain1, kcofreq, kres, kdist
afilt2 lpf18 ain2, kcofreq, kres, kdist
aout1 = (afilt1 * 1/kdist) *.8
aout2 = (afilt2 * 1/kdist) *.8
else
aout1 lpf18 ain1, kcofreq, kres, 0
aout2 lpf18 ain2, kcofreq, kres, 0
aout1 *= 1.5
aout2 *= 1.5
endif
printk2 kdist
else
aout1 = ain1
aout2 = ain2
endif
</code>
<comments>
DESCRIPTION:
Filter with the lpf18 opcode, an implementation of a 3 pole sweepable resonant lowpass filter
CONTROLLERS:
ON/OFF - bypass
fine/coarse frequency - cutoff frequency of filter
resonance - amount of resonance
distort - amount of distortion
---
version 1.11, May 2020
- added comments on controllers
- added checkbox for distortion
- tried to control amplitudes of distortion
version 1.1, 2016
- new GUI and small code adaptations by Menno Knevel
version 1.0, 2008?
- initial version by Michael Bechard</comments>
<opcodeList/>
<graphicInterface editEnabled='false'>
<gridSettings>
<width>5</width>
<height>5</height>
<gridStyle>LINE</gridStyle>
<snapGridEnabled>true</snapGridEnabled>
</gridSettings>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBGroup'>
<objectName></objectName>
<x>0</x>
<y>0</y>
<groupName>Group</groupName>
<backgroundColor>0x00000033</backgroundColor>
<borderColor>0x000000ff</borderColor>
<labelTextColor>0xffffffff</labelTextColor>
<titleEnabled>true</titleEnabled>
<width>20</width>
<height>20</height>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBCheckBox'>
<objectName>lpf18ON</objectName>
<x>0</x>
<y>0</y>
<automationAllowed>true</automationAllowed>
<label/>
<selected>true</selected>
<randomizable>true</randomizable>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBGroup'>
<objectName></objectName>
<x>5</x>
<y>10</y>
<groupName>Group</groupName>
<backgroundColor>0x4d8080ff</backgroundColor>
<borderColor>0x000000ff</borderColor>
<labelTextColor>0xffffffff</labelTextColor>
<titleEnabled>false</titleEnabled>
<width>20</width>
<height>20</height>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBHSlider' version='2'>
<objectName>lpf18_frequency fine</objectName>
<x>10</x>
<y>10</y>
<automationAllowed>true</automationAllowed>
<minimum>0.0</minimum>
<maximum>1000.0</maximum>
<bdresolution>1</bdresolution>
<value>502.0</value>
<sliderWidth>200</sliderWidth>
<randomizable>true</randomizable>
<valueDisplayEnabled>true</valueDisplayEnabled>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBLabel' version='2'>
<objectName></objectName>
<x>70</x>
<y>40</y>
<label>coarse frequency</label>
<font>
<name>System Regular</name>
<size>12.0</size>
</font>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBLabel' version='2'>
<objectName></objectName>
<x>80</x>
<y>5</y>
<label>fine frequency</label>
<font>
<name>System Regular</name>
<size>12.0</size>
</font>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBKnob' version='2'>
<objectName>lpf18_distortion</objectName>
<x>335</x>
<y>15</y>
<automationAllowed>true</automationAllowed>
<minimum>1.0</minimum>
<maximum>40.0</maximum>
<value>6.460000000000001</value>
<knobWidth>40</knobWidth>
<randomizable>true</randomizable>
<valueDisplayEnabled>false</valueDisplayEnabled>
<label>distort</label>
<labelEnabled>true</labelEnabled>
<font>
<name>System Regular</name>
<size>12.0</size>
</font>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBHSlider' version='2'>
<objectName>lpf18_frequency coarse</objectName>
<x>10</x>
<y>45</y>
<automationAllowed>true</automationAllowed>
<minimum>0.0</minimum>
<maximum>20000.0</maximum>
<bdresolution>1E+3</bdresolution>
<value>2000.0</value>
<sliderWidth>200</sliderWidth>
<randomizable>true</randomizable>
<valueDisplayEnabled>true</valueDisplayEnabled>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBCheckBox'>
<objectName>lpf18_distortion ON</objectName>
<x>380</x>
<y>15</y>
<automationAllowed>true</automationAllowed>
<label/>
<selected>false</selected>
<randomizable>true</randomizable>
</bsbObject>
<bsbObject type='blue.orchestra.blueSynthBuilder.BSBKnob' version='2'>
<objectName>lpf18_resonance</objectName>
<x>270</x>
<y>15</y>
<automationAllowed>true</automationAllowed>
<minimum>0.0</minimum>
<maximum>1.2</maximum>
<value>0.3241900999999999</value>
<knobWidth>40</knobWidth>
<randomizable>true</randomizable>
<valueDisplayEnabled>false</valueDisplayEnabled>
<label>resonance</label>
<labelEnabled>true</labelEnabled>
<font>
<name>System Regular</name>
<size>12.0</size>
</font>
</bsbObject>
</bsbObject>
</bsbObject>
</graphicInterface>
<parameterList>
<parameter uniqueId='-1342660265' name='lpf18_distortion' label='' min='1.0' max='40.0' bdresolution='-1' automationEnabled='false' value='6.460000000000001'>
<line name='' version='2' max='40.0' min='1.0' bdresolution='-1' color='-8355712' rightBound='false' endPointsLinked='false'>
<linePoint x='0.0' y='6.460000000000001'/>
</line>
</parameter>
<parameter uniqueId='-1342660263' name='lpf18_resonance' label='' min='0.0' max='1.2' bdresolution='-1' automationEnabled='false' value='0.3241900999999999'>
<line name='' version='2' max='1.2' min='0.0' bdresolution='-1' color='-8355712' rightBound='false' endPointsLinked='false'>
<linePoint x='0.0' y='0.3241900999999999'/>
</line>
</parameter>
<parameter uniqueId='-939472334' name='lpf18_frequency coarse' label='' min='0.0' max='20000.0' bdresolution='1E+3' automationEnabled='false' value='2000.0'>
<line name='' version='2' max='20000.0' min='0.0' bdresolution='1E+3' color='-8355712' rightBound='false' endPointsLinked='false'>
<linePoint x='0.0' y='2000.0'/>
</line>
</parameter>
<parameter uniqueId='-939472332' name='lpf18_frequency fine' label='' min='0.0' max='1000.0' bdresolution='1' automationEnabled='false' value='502.0'>
<line name='' version='2' max='1000.0' min='0.0' bdresolution='1' color='-8355712' rightBound='false' endPointsLinked='false'>
<linePoint x='0.0' y='502.0'/>
</line>
</parameter>
<parameter uniqueId='-104104189' name='lpf18ON' label='' min='0.0' max='1.0' bdresolution='1' automationEnabled='false' value='1.0'>
<line name='' version='2' max='1.0' min='0.0' bdresolution='1' color='-8355712' rightBound='false' endPointsLinked='false'>
<linePoint x='0.0' y='1.0'/>
</line>
</parameter>
<parameter uniqueId='405407277' name='lpf18_distortion ON' label='' min='0.0' max='1.0' bdresolution='1' automationEnabled='false' value='0.0'>
<line name='' version='2' max='1.0' min='0.0' bdresolution='1' color='-8355712' rightBound='false' endPointsLinked='false'>
<linePoint x='0.0' y='0.0'/>
</line>
</parameter>
</parameterList>
</effect>