The Gong Show. Here, Steve Martin is one of the panelist and a great performer. Steve M. was playing the banjo. Too Bad Mr. Barris had to ruin his act. Plus you see a short magic performance. Chuck Barris is the host. The name of the piece is "Foggy Mountain Breakdown".
Steve Martin has his own album of his music. He was also featured and performed on American Idol season 8 finale.