Jose Antonio Alcayaga III just posted this link on Facebook and it seemed like a great one to share. Badok has a relatively large selection of Basque music available for online listening and I understand that songs can be downloaded in mp3 format.
This seems like a great way to explore Basque music. It looks like there is a large range of styles, from folk like Oskorri to metal bands such as Su Ta Gar. And the artists seem to span a range of time, including classics from Kortatu. Not everything is on here, as I don’t see any Negu Gorriak for example, but there is still a large number of groups to explore.
Thanks for sharing Jose!