Accordions on the Azores islands?

After drinking lots of tea in the Chá Gorreana tea factory we went to the tea plantation just next to it. While enjoying the view we heard someone playing an accordion which we had been looking for the whole trip. Video is shot with Samsung NX1 with 16-50 F2-2.8 S lens, in 4K resolution, converted to FullHD for an easier workflow in DaVinci Resolve 12.