@luciens, i appreciate where you're comin' from, but your take/experience doesn't attend to the OP's predicament, it isn't everyone else's experience, and your advice (re: intonation) goes against 'best practices' for fretless EB playing. being the outlier on the subject of intonation (e.g.,
it doesn't matter) won't stand up, objectively. but you know that, right?
It's not a matter of opinion, like what kind of bass you like to play or the type of music you like, I'm afraid. I know, I know - every time this comes up nobody believes me, but the issue and the outcome are the same every time. We're simply talking about a level of precision of adjustment that is
not needed on the fretless bass.
So, let's go over the objective facts:
- The OP reports that the intonation of the
bass had changed over time, despite the apparent fact that the
bass was
not adjusted in any way in that period.
- The OP apparently has
not been bothered by the bass until he began to
wonder if his bass needed intonation adjustment.
- Nobody in this thread can
agree whether such a thing is needed or not or
how it is to be done.
- We all somehow still manage to play our fretless basses with no more or less difficulty on both intonated and non-intonated fretless basses.
- We only become bothered by the intonation of our fretless basses when someone tells us we need to be bothered by it.
Those are the facts, every single time this comes up, and those will always be the facts every time this comes up: it was the
player whose intonation had changed over time, not the
bass. Why? Because the fretless bass is intonated by the
player (the
fretted bass is intonated by the bass, not the player).
More objective facts: on the fretless, some guys absolutely insist they can't play their FL's in tune unless they're properly intonated, other guys like myself quit trying to do this decades ago once we discovered it neither hurt nor helped, but they can still play their FL basses in tune with the same level of difficulty. And some guys are somewhere in between. There is
no such controversy on the
fretted bass: everyone agrees and knows that the fretted bass must be intonated, we can all tell when it's not intonated properly and we know exactly what to do to correct it.
The practical result of this is only that the guys who are worried about it spend X amount of time fiddling with their bridges and a tuner, instead of that X amount of time playing, enjoying and learning to intonate on, their fretless basses. Unlike the fretted bass, where this activity not only makes a difference but is critical for it to be in tune, this is a waste of time on the FL bass because it's an attempt to adjust the wrong item in the equation.
So back to my original claim: the OP's luthier did exactly the right thing and told him exactly the right thing: the player manages the intonation on the fretless bass, not the bass. Fretless basses do not go in and out of adjustment in any way that the player can detect (except for knocking strings out of tune, or the mild, but consistent, changes with going to different string types, etc) or correct with the tiny amount of bridge saddle movements. The player is what goes in and out of adjustment, so that's where the focus needs to be if he is concerned about playing in tune.
Of course, it's the exact opposite on the fretted bass, as we all know...
L