What year was the album released by Gato Barbieri which features live performances recorded at the second largest jazz festival in the world?
El Pampero: El Pampero is a live album by Argentinian jazz composer and saxophonist Gato Barbieri featuring performances recorded at the Montreux Jazz Festival in 1971 and first released on the Flying Dutchman label. Montreux Jazz Festival:  It is the second largest annual jazz festival in the world after Canada's Montreal International Jazz Festival.
1971