At the suggestion of Jome77, I thought I would post a little link here, yes it's another example of shameless promotion:
Progressive Rock Giant "Happy The Man" Back in the Game with Re-release
The thing that you may find interesting, is that my bass playing on this record is exclusively the Roscoe Twins, which Keith made for me around 18 years ago. Both are medium scale with RMC Midi Systems and no mags, as you can see:
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With the help of the Roland V Bass - I managed a variety of fretless sounds and even an upright sound that I am pretty proud of. I had to go easy, our music is not suited to a fretless sound with a lot of mwuuuah... Subtlety goes a long way here.
The fretless examples are on the songs "The Muse Awakens" and "Slipstream" and I used the upright sound on "Adrift". All the songs are posted on YouTube if you want to put an ear on anything.
I know many of you guys get a real charge out of discussing the finer points of Barts vs. Auguilar and so on, and I certainly wouldn't want to rain on that parade.
But when it comes to Keith's amazing instruments, my point is - you don't even need any mags to exhibit a wonderful full, rich and deep tone from these awesome works of art.