I recently acquired a Logitech Squeezebox Radio for Internet radio and streaming music from my PC. Although the built-in speaker is not great, it drives a pair of powered speakers (with sub-woofer) very well ...... great stereo sound.
I now use squeezeboxserver from the repository which makes my music available to the radio.
Does you radio require a DNLA server on the PC?
You should also check your Firewall if enabled.
Happy New year!