Willie P. Bennett, who played Stardust in the video I posted above, was a master of throat vibrato and playing a ten hole rack mounted harp. He played blues, folk or bluegrass equally well. He played with the harp held in his hands or in a rack while he played mandolin or guitar. He was also one of Canada's greatest song-writers and unsung heroes. He was also a great guy who passed way too early. He used one of the simple old Elton harp racks, the kind Jimmy Reed and Bob Dylan used.