Watch first my video:
I use a real live ATC app and for windows desktop/laptop this:
http://www.liveatc.net/search/?icao=eham
Samples: http://www.liveatc.net/flisten.php?mount=eham_gnd&icao=eham
http://www.liveatc.net/flisten.php?mount=eham_twr&icao=eham
http://www.liveatc.net/flisten.php?mount=eham4&icao=eham
You can listen from countries (where it is not forbidden) all communications..
Learning and listening and enjoy..