Get Greek Pronunciation Right
I'm learning Greek in Duolingo and one of the major impediment between me and perfect Greek pronunciation was the audio. I couldn't make out the sounds properly. I have found two videos, which could be as useful to you as it was to me.
For external Greek help, check out this Youtube channel: https://www.youtube.com/channel/UC3ntiYnE2MYWmwyS4mZCH4w