<p>Based on comment from&nbsp;Dr Forinor :</p>

<p>I have add 2 options :&nbsp;</p>

<p><span style="font-family: 'Noto Sans', sans-serif; font-size: 13.65px; line-height: 19.11px;">The first one is to tell MP to select the default track (tagged in MKV)&nbsp;</span><br style="font-family: 'Noto Sans', sans-serif; font-size: 13.65px; line-height: 19.11px;" />
<span style="font-family: 'Noto Sans', sans-serif; font-size: 13.65px; line-height: 19.11px;">The second one is to set and get&nbsp;setting from LAV Splitter and then MP will switch to the selected one from LAV Splitter.</span><br style="font-family: 'Noto Sans', sans-serif; font-size: 13.65px; line-height: 19.11px;" />
<br style="font-family: 'Noto Sans', sans-serif; font-size: 13.65px; line-height: 19.11px;" />
<span style="font-family: 'Noto Sans', sans-serif; font-size: 13.65px; line-height: 19.11px;">Both option need LAV splitter in Codec section</span></p>