It is frustrating when the link produces no sound, and possibly you get an on screen message like: "No player available for this type of file". You don't know what type of file they are trying to feed. You often do not know what player they want you to use. Makes trouble-shooting next to impossible. My primary computer would not receive a lot of streams for several months. It finally turned out that I had a codec in place, but it was listed in my machines registry so for all practical purposes, it didn't exist. I had no clues to track this thing down. You cannot imagine how many forums on audio I tracked on Google before I finally found a message that opened things up for me.
Some of the (traditional) broadcasting companies like CBS use a proprietary stream that requires their proprietary player installed on your computer. And it may not minimize. It wants enough space on your screen that they can feed changing visual advertising to your screen. Everybody is dreaming of establishing (marking?) their turf for the day that being able to sell those ads becomes very, very lucrative. If they use a common or generic stream protocol, then you can use the player application of your choice and you chop the head off their advertising vehicle.
Getting back to ABQRADIO.... maybe he is trying one of four or five stream types he assumes they are sending so he can use the Player APP of HIS choice, not their choice. When they cloak their streaming technology where you cannot see a PLS or other common file type, I assume they are using only ONE file type, and they are not interested in me, you, or ABQRADIO even knowing what file type it is.
I do see that many streamers, both on-line-only and the tradition broadcasters.... on their webpage will let you choose from 3 or 4 different file types, one of which should be most comfortable for the apps you have installed. May their tribe increase.