When I do staccatoes with my left hand fingers (press the fret and release immidiately, but finger still on the fret), I hear noisy harmonic sound as I release the fret. I started to doubt if I'm doing the staccato right or not, or it's just my bass. I tried to play the staccato on my teacher's Streamer, with a MEC single coil and Bartolini dual coil both on, I still hear the same harmonic sound. I asked teach about the problem, found him doing the same technique as I do. He simply solve the problem by killing the Bartolini. I wonder if there is a way to staccato without making harmonic sound in ANY pickup or bass?