So . . . I've been playing bass for well over 50 years, first 30 on electric, last 20 predominately on string bass. As I'm self-taught I used the 1 finger per note electric style, built my strength and intonation, played many gigs. I always noticed other bassists' left hands looked different, which I came to understand was the more classical Simandl (or, I guess others) technique which I'm now practicing. My question is - - does it make sense at this point to re-learn my left hand? Why is the ring finger always reinforcing the pinky? Is there a basic fact of human ergonometrics that dictates this as the better position? thanks ~~~
Few people have large enough hands to use one finger per half step on upright. I have read Stanley Clarke can do it--I don't know if it's true.
There are players who use a four finger technique that involves pivots are micro-shifts. Some use a similar technique on bass guitar, rather than one finger per fret.
Here's a video:
Marcos Machado has not published all of the books he mentions in the video, and the print version of Volume 1 is currently sold out. The E-book of Vol 1 is available here:
https://www.taoofbass.com/
I believe Mr Machodo's bass is more of a solo size than standard 3/4, so that may be a significant factor.
My story:
I started upright using Simandl. When I started learning to play bass guitar I simply applied and adapted what I had learned on upright. All of my formal training was on upright. Never had single bass guitar lesson.
About two years into my pro career it was becoming increasingly obvious that I would benefit from using one finger per fret on bass guitar. So I set about figuring out a new fingering system. Concurrent to this, I also transitioned to 5-string BG, and then a few years later to 6-string BG. Honestly adding the extra strings was far more challenging for me than developing/learning a new fingering system. When I got lost with OFPF, I simply reverted back to Simandl fingering. But If got lost on an extended the fret board of an extended range instrument, I really felt lost and panicked.
I felt relatively competent playing extended range instruments after about two years. But IMHO it took close to a decade before I felt like I was a natural on 6-string. A 6-string player tends to play across the strings more than up and down the neck, so you develop different ways of thinking and navigating around the instrument. That doesn't mean you lose the ability to shift, it's just not what comes immediately to mind when you see notes on a page coming at you at light speed. Now when I play a 5-string or 4-string bass guitar, I really miss the extra string(s) and sometimes have to stop and work out how to play lines that I can easily play on 6-string.
I played upright and bass guitar for the duration of my career, and my technique on each instrument continually become more and more specialized. My journey was from upright to bass guitar, and your journey is from bass guitar to upright. I suspect that you will find that as you continue to hone your skills on each instrument, you will also find it necessary to specialize on each instrument exactly as I did. This will cause your technique on each instrument to become more and more differentiated as time passes.