Fun practice from several years ago:
Older Radio Redwood promos:
Clips (from Episode 10 of The Goden Ganesh) of Dee, an Australian who has lived in the U.S. for a long time and has a mixed accent. (I didn't have Australian friends or access to accent courses at the time, so I based the accent on a Youtuber. I don't think I did great on the accent.) I was working on my M.A. in Ethnomusicology at the time, and I recorded this on a basic audio recording device signed out from the Ethnomusicology lab for a field work project.