I've recently started on double bass, and at the same time I'm seriously picking up the violin again for the first time in a decade. I'm finding that the bass (both EB and DB) demands tough fingertips, which I have (invisible, but thick skin). The violin on the other hand, needs softer, more sensitive fingertips. One reason is so that the player can feel the string and manage intonation. Perhaps most importantly, vibrato and some other techniques want the point of contact to be flexible and "grabby". Calluses are smooth and don't have that inherent stickiness that soft skin does, so my finger slides around more than it should. So... How do I resolve this issue between the instruments? I can sand my calluses down, but that might result in them growing back even harder. I can also play the violin with the point of the fingertip and the bass with the pad part of the tip. Does anybody have a good way to deal with or think about this issue? It kind of feels like playing upright is putting on boxing gloves and knocking someone out, and playing the violin is gently typing on a computer keyboard... Not exactly compatible.