I am a fairly new bass palyer and just learning to play on a electric. I have been playing an upright for just over a year(mostly bluegrass and oldtimey stuff) and am now working on learning to play an Ibanez acustic bass that I run through a 35w Ibanez bass amp. Here is my problem... I am having a real hard time with symathetic vibrations building up in the E & A strings. If I am working on something deep and blues or walking lines starting on the E string by the time I finish the chop it's a mess of noise and feedback like builtup. I really like the tone I am gettting before this, so hope not to have to change my setup. I sometimes wrap my thumb around the neck to dampen the E string, but find ths very flustrationg. At tiem like this I amtempted to dump the electric beast and go back to my upright where this was never a problem! Help!