Troublant Bolero is a tune by Django Reinhardt. He first recorded the tune in 1948.
Here is a recording of Troublant Bolero palyed by the Romani “gypsy jazz” guitarist Angelo Debarre, and “gypsy jazz” accordion virtuoso Ludovic Beier.
“Gypsy jazz” is a style of jazz that is believed to be invented by the Romani guitarist Django Reinhardt in the 1930s. It combines dark, chromatic gypsy sounds with swing.