| If there's a slight dip, then the higher frets would be close to the strings; that's maybe where they're striking together? You might try a bow on one of your basses to compare; so the neck ramps away from the strings toward the high end.
Other than that, you might have a second look at your picking fingers - whether they are moving inward toward the face of the instrument, making the initial string movement away and toward the neck and pickups, rather than parallel to the plane of the fretboard/body.
Another thing might be to play more towards the bridge, like an inch or inch and a half in front of it, to minimize the movement of the string. You can compensate for a lessening of volume and a thinning of tone with the amp controls. |