In the years since, his unfaltering pursuit of this passion has yielded dumbfounding results. His self-taught virtuosity in almost every instrument that comes to mind is unparalleled to my knowledge. (I would say Trent Reznor, but he was classically trained) His connection to creative stream of consciousness without interface or dilution seems to be the key to his improvisational abilities. I promise anyone whose played alongside him would agree.
However, for a number of years, if you asked Streavig whom he recorded with, you would have been looking right at them. Volumes of recordings were made which sounded like full four of five piece groups playing in harmony. What really is stunning to a first time listener, though, is that instead of five performers on five instruments side by side in a studio, the sound they are hearing is the result of flawless overlaying of tracks all performed by Bert himself; Bert playing along with Bert. Thus, brand new compositions were created one track/instrument at a time never writing down a single note. As they say, "playing it by ear".