Hello Nicolas, Joan Pau often plays with Big Mama Montse in an acoustic duo, in fact he recorded last three Big Mama CDs http://www.bigmamamontse.com/ and for a little bit info in english: http://www.harmonicaspain.com/eng/joan_pau_cumellas.htm this info is a little old, spanish bio was recently updated, check it out with any online translator. Regards, Andrés