Any ideas concerning my 1981 P Bass. It has roundwound strings fitted and when playing octaves quite quickly there is a lot of resonance. So much so its difficult to get separation between running notes. Also when slowly repeating say an A on the top string (on fret 2) the other open strings particularly the A string rings so much it interferes. The neck is also very sensitive if you tap it on the rear side when the amp is on it resonates a lot. Any ideas?