How to control two groups with knobs

Here is an example of a preset that has two knobs, each one controlling the volume of a different group:

<?xml version="1.0" encoding="UTF-8"?> <DecentSampler pluginVersion="1"> <ui width="812" height="375"> <tab name="main"> <labeled-knob x="100" y="60" label="Group 1" type="float" minValue="0" maxValue="1" textColor="FF000000" value="0.5"> <binding type="amp" level="group" position="0" parameter="AMP_VOLUME" translation="linear" translationOutputMin="0" translationOutputMax="1.0" /> </labeled-knob> <labeled-knob x="200" y="60" label="Group 1" type="float" minValue="0" maxValue="1" textColor="FF000000" value="0.5"> <binding type="amp" level="group" position="1" parameter="AMP_VOLUME" translation="linear" translationOutputMin="0" translationOutputMax="1.0" /> </labeled-knob> </tab> </ui> <groups> <group name="Group1"> <!-- Samples for group 1 go here --> </group> <group name="Group2"> <!-- Samples for group 2 go here --> </group> </groups> </DecentSampler>
Code language: HTML, XML (xml)