hi folks
I have a bass which makes a distinct beating noise, at maybe 5 Hz or so?, when I plug it in - but only when I'm touching the strings. The more contact, the louder the noise. Other basses don't do this, with the same amp and lead. If I unplug the bass and hold the free end of the lead, I get the same effect.
I'm guessing this is a bad earth on the bass, and possibly bad shielding. Does that make sense?
Thanks for reading