I saw the jazz pickup in there, but I also noticed the toggle is on the neck position - and it looks like there's a toaster there. Of course, that assumes its even wired close to stock, so hard to say if/how that contributes. Great sound in any case, and the whole lineup there really works for me. Good stuff!
I thought to look up Brubeck having come across this clip, with a guy named Anders Christensen plaing a 4001 in a jazz/bebop outfit:
I actually don't care much for that, but if you make it past the dirge at the beginning it picks up around 1:00. For some reason I got a kick out of seeing a Ric in a setting like that. Seems like its prone to get typecast as a rock-n-roll bass. Anyway, that's what made me think of Brubeck.
This whole Internet/Youtube stuff is great. It's like playing six degrees of Kevin Bacon, or something. An ADD person's dream come true! I found the above clip due to Steve Cardenas' (the guitarist on the 335) association with bass player Ben Allison. I liked his playing and solo (2:25) in this and wanted to see more of him:
Wait... what was I talking about again?