Add BBC Radio 4 to Synology Audio Station

Download the ASX file from http://bbcstreams.com/ (right click on the (link) and save as filename.txt

Open the saved file with Gedit and copy the line

mms://wmlive-acl.bbc.co.uk/wms/bbc_ami/radio4/radio4_bb_live_eq1_sl0?BBC-UID=d4ec8a9b7be2b54f4179473740e0ac2

Paste in to User Defined Synology Audio Station URL field and change the mms to http.

Done

With thanks to http://forum.synology.com/enu/viewtopic.php?f=63&t=24622#p99007