It can with an outbound access-list, but you'll have to do some investigation as to what IP address the PC is connecting to to be able to stop it. If you can determine what port they're all connecting on then that would be easier to stop.
The easiest way to see what the PIX is allowing is to start Internet Radio from your PC, and then check the syslog on the PIX to see what connection it opened, this'll tell you the port number and the destination IP address.
I may be wrong but I think Radio uses TCP/UDP port 469, so something like the following would block all that:
Login to the FXOS chassis manager.
Direct your browser to https://hostname/, and log-in using the user-name and password.
Go to Help > About and check the current version:
Check the current version availa...
We have configured the outside and inside Interface with official ipv6 adresses, set a default route on outside Interface to our router, we also have definied a rule , which also gets hits, to permit tcp from inside Interface to any6.
In Syslog I also se...