Hello,
I recently got a TCL 55" 55R617 and I'm having difficulties with playing certain audio tracks of .mkv files with Roku media player. Some of my files the Roku media player will default to a certain audio track which often is the wrong track and it will not allow me to change the audio track even if more languages exist in the file. Also there are files I have where if there are 2 English audio channels (one is narration in English) it will only see the wrong English track, I can change the audio channel to other languages but it only sees one of the two English channels. I am playing my files from a hard drive connected to the TV. Is there anything I can do or any workarounds to be able to watch these files with the correct audio channel?