Triple J is a national Australian radio station first started in 1975 mainly aimed at a youthful audience (defined as those between 12 and 25). Music played on the station is generally more alternative than commercial stations with a heavy emphasis on new and Australian music. During the day, there’s usually a healthy selection of modern indie tracks from artists such as Sigur Rós who I’d never expect to hear on a national radio station. They play quite a variety on the station ranging from metal, to hip hop and from house to punk in their speciality night programs. 

To get it in iTunes, visit http://www.abc.net.au/triplej/ and click ‘listen’. Then chose mp3 stream in the pop-up that appears. On a mac, an m3u file is downloaded and this can be opened in iTunes.