Static-y rumbling?

[TalkingWaffle]

I had my bass in my closet for about a week (tuned waaaay low, to around C) and I took it out, changed the strings and started playing, but im getting a really loud wavy static noise every time i strike a note. I run my guitar through the same amp and it sounds fine, so i assume the problem is with the bass.

I'm a fairly new player and I've never had a problem like this before, can anyone help me out?

 

[Slowgypsy]

I had my bass in my closet for about a week (tuned waaaay low, to around C) and I took it out, changed the strings and started playing, but im getting a really loud wavy static noise every time i strike a note. I run my guitar through the same amp and it sounds fine, so i assume the problem is with the bass.

I'm a fairly new player and I've never had a problem like this before, can anyone help me out?

This is like trying to dance architecture

Active preamp? Try changing the battery.
Weird sound on open strings as well as fretted notes?
Have you checked neck relief?
Bass make/model?