There are free sound files of Ros Muc Irish available from DIAS at the address below. (Just scroll down for the English version).
Tá comhaid chainte ar fáil saor in aisce as Foras Ardléinn Átha Cliath:
http://www.celt.dias.ie/publications/online/caint_ros_muc/index_ga.html Is iontach an rud é.