I have a G61R, 210, HD621 and Chromecast Ultra.

How would I best stream mkv files from my PC? I tried to "cast" from PC to the 210 and that semi worked to my surprise smile

It seems the Chromecast doesn't support mkv.

What other devices are you using?

I'm mostly interested in getting the audio to the G61R,

Main: Marantz Cinema 50, Meridian 271, DSP7200.2, DSP5200HC, DSP5000 rears, Meridian 210.
PC/Headphones: Mytek Liberty II, Sansui CA-F1, Sansui B-2301, Sennheiser HD800, Kef R3