[Paul S]

I added a connection for your audio pins. I used pin #4 - Line In. If you are using a different input, like Aux, you would change the pin number.

  <capturecard commercialname="WinFast TV2000 XP Deluxe" capturename="WinFast TV2000 XP WDM Video Capture" devid="ven_109e&amp;dev_036e&amp;subsys_6606107d&amp;rev_11">
    <capabilities tv="true" radio="false" mpeg2="true" mce="false" sw="false" bda="false"/>
    <tv>
      <interface cat="mux" video="" audio="" mpeg2="0"/>
      <filters>
        <filter cat="tvtuner"		  name="WinFast TV2000 XP WDM TVTuner"		    checkdevice="true"/>
        <filter cat="tvaudio"		  name="WinFast TV2000 XP WDM TVAudio"		    checkdevice="true"/>
        <filter cat="crossbar"		name="WinFast TV2000 XP WDM Crossbar"		    checkdevice="true"/>
        <filter cat="capture"		  name="WinFast TV2000 XP WDM Video Capture"	checkdevice="true"/>
        <filter cat="audcapture"	name="%soundcard%"							            checkdevice="true"/>
        <filter cat="videncoder"	name="LeadTek MPEG Video Encoder"			      checkdevice="false"/>
        <filter cat="audencoder"	name="LeadTek Audio Encoder"				        checkdevice="false"/>
        <filter cat="mux"			    name="Leadtek MPEG Muxer"					          checkdevice="false"/>
      </filters>
      <connections>
        <connection sourcefilter="tvtuner"		sourcepin="0" sinkfilter="crossbar"		sinkpin="%tvtuner%"/>
        <connection sourcefilter="tvtuner"		sourcepin="1" sinkfilter="tvaudio"		sinkpin="0"/>
        <connection sourcefilter="tvaudio"		sourcepin="0" sinkfilter="crossbar"		sinkpin="%audiotuner%"/>
        <connection sourcefilter="crossbar"		sourcepin="0" sinkfilter="capture"		sinkpin="0"/>
	<connection sourcefilter="crossbar"		sourcepin="1" sinkfilter="audcapture"		sinkpin="4"/>
        <connection sourcefilter="capture"		sourcepin="0" sinkfilter="videncoder"	sinkpin="0"/>
        <connection sourcefilter="audcapture"	sourcepin="0" sinkfilter="audencoder"	sinkpin="0"/>
        <connection sourcefilter="videncoder"	sourcepin="0" sinkfilter="mux"			  sinkpin="0"/>
        <connection sourcefilter="audencoder"	sourcepin="0" sinkfilter="mux"			  sinkpin="1"/>
      </connections>
    </tv>
  </capturecard>