Effects Phish's Mike Gordon uses

Hey all. I'm just wondering what kind of effects Gordon uses? Mostly i'm talking about this one type of sound i keep hearing on a bunch of songs. For example, on Weekapaug groove, is that just the sound of gordons bass when he slaps it or is that an effect he's using? That same sound can also be heard on live versions of AC/DC Bag. He uses it in a couple of other songs also. Anyone know if this is a certain effect or if its just his bass?

Also, how does he get that sound on the beginning of Down with disease? Is that an effect or is that becuase he's picking it?

Just wondering becuase i think the sound he makes on those songs are awesome. Let me know, thanks.

 

allright cool. Thanks for letting me know what that sound was. By the way, i was actually thinking about getting a flanger soon so can you reccomend a really nice one, but not too expensive? Thanks for everything.