Here are three hours of free and ad free Bach played solo by the Russian-born violinist Alina Ibragimova as part of BBC Proms 2015. Thanks to the BBC license fee payers.
Prom 19: http://goo.gl/dDSA08
Prom 21: http://goo.gl/48dp5g
If so much solo violin isn't to your taste, the icing on the cake, or the party, as Alina herself describes it, is the final piece: Bach's Partita No. 3 in E major for solo violin, BWV 1006:
Listen here (~20 mins.): http://goo.gl/a5SffZ
These should be available online worldwide without restriction but only for one month after the most recent broadcast. They are easiest to play on a computer (but use Flash) although they will work on iOS (with or without the iPlayer app) and once the BBC media player http://goo.gl/oHuhfM is installed, will work on Android too.
I ask her where it comes from. "I've no idea," she says, "but I do think it's important that music should speak as directly as possible. We should always be trying to achieve something further in the music, something that's almost impossible."
More here (article): http://goo.gl/9g7puA
Image Public Domain: https://goo.gl/avvFdG