New sounds for the Viola: slide guitar! Marcel RochaApril 20, 2020April 20, 2020PERFORMANCES Post navigation PreviousNext A new composition featuring a new technique for the Viola Caipira: slide guitar!!! View this post on Instagram Trying new ideas for the Brazilian viola (10-string guitar). A post shared by Marcel Rocha (@marcelrocha17) on Mar 11, 2019 at 7:14am PDT