auxiliary.xml

<!DOCTYPE template>
<!--
  Description:
    The auxiliary channel controls.
  Variables:
    i: The auxiliary channel number (1-indexed)
-->

<Template>
  <WidgetGroup>
    <ObjectName>AuxiliaryContainer</ObjectName>
    <Layout>horizontal</Layout>
    <SizePolicy>min,min</SizePolicy>
    <Children>
      <Template src="skin:vumeter.xml">
        <SetVariable name="group">[Auxiliary<Variable name="i"/>]</SetVariable>
        <SetVariable name="TooltipId">channel_VuMeter</SetVariable>
        <SetVariable name="control">VuMeter</SetVariable>
      </Template>

      <Template src="skin:knob_with_button.xml">
        <SetVariable name="TooltipId">pregain</SetVariable>
        <SetVariable name="group">[Auxiliary<Variable name="i"/>]</SetVariable>
        <SetVariable name="control">pregain</SetVariable>
        <SetVariable name="color">red</SetVariable>
        <SetVariable name="button_TooltipId">mute</SetVariable>
        <SetVariable name="button_control">mute</SetVariable>
        <SetVariable name="label">Gain</SetVariable>
      </Template>
    </Children>
    <Connection>
      <ConfigKey>[Auxiliary<Variable name="i"/>],enabled</ConfigKey>
      <BindProperty>visible</BindProperty>
    </Connection>
  </WidgetGroup>
</Template>