Here is a wonderful 7 minute video of Owen Lee playing a 1590 Gasparo da Salo after it's 2.5 year restoration at the Cincinnati Bass Cellar. I recall my teacher Alex Nichol many years ago talking about early basses that were originally strung with 3 gut strings. This must be one of them! Or was this a 6 string violone? Owen plays some Koussevitzky, Bach and Beethoven...very beautifully.