O/S is Windows 7 64-bit. Player "system" is laptop/Airport Express/Airfoil/SoundPimp (last one simply delivers vast improvemengt in sound) feeding, via RCA audio cable to a Bang & Olufsen vintage receiver. B&O stereo output is to 2 AR "bookshelf" (BIG SHELF) with 13" sub-woofer.
Stuck commercial has not happened again, but still cursed with radical increase in volume of commercials. Suggestion: Use info found of listener's pattern to send more appropriate commercials to listener.