Madredeus is a well-known ensemble from Lisbon that does a kind of fado-influenced chamber folk/new age music. You may know them from the Wim Wenders film Lisbon Story. I just came across this film they did in 1995 with director Rob Rombout in the Azores, when they still had their original singer, Teresa Salgueiro. It's basically an extended music video disguised as a documentary, but shows a lot of local customs that I have spoken about elsewhere. It's all in Portuguese and French, but that isn't too much of a problem.