Cast mp3's from networked desktop computer
Have a few hundred GB mp3 music on networked desktop. Use JRiver, Windows Media Player or VLC media players to play. Can I cast the mp3's to a chromecast audio connected to my receiver using one of these programs? If not is there an app on Chrome that would access the mp3's on hard drive so as to cast them to receiver without having to upload them to Google Play?
Yes you can "mirror" any audio directly from your laptop/desktop. I'm on a Mac so I don't use those platforms. But if Apple works, which is at war with Google, I should think it would work with a PC.
Google community can give you specifics on your setup.
https://support.google.com/chromecast/?hl=en#topic=6279362