I heard on Radio 3 an announcement about a concert to take place tomorrow evening from Buenos Aires, part of the ongoing commemoration of the founding of the Welsh Patagonian community. This is the link to that concert:
(to go out live at 19:30 GMT on Tues 3 November 2015 and then should be available on iplayer for up to about 28 days).
Looking further, it seems this is part of a 3-week tour by the BBC NOW, including Argentinia, Chile and Uruguay. Some info here:
BBC NOW link: