   MP3   user-agent! WMA     user-agent.

 -:
 ->   -> User-Agent ->    :
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US)

Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 (KHTML, like Gecko) Chrome/17.0.919.0 Safari/535.7

Opera/9.80 (Windows NT 6.1; U; YB/3.5.1; ru) Presto/2.10.229 Version/11.64
  "".