Jerry Garcia fans, need help identifying a sound!

Hey guys, I need help with something. I'm wondering what pedal Jerry is using in songs such as Estimated Prophet. Its that signature sound I've only ever heard him use, like some wierd phaser or something. I really don't know how to decribe it so heres a link to a youtube video. Any help is appreciated!
http://youtube.com/watch?v=mzOyHuRzzq0

 

Good question....I'd like to know that too.......c'mon you hippie musicians out there!!

 

Cool stuff man, thanks.

 

I'm not sure what pedal Garcia uses, but he always rocks a wicked solo during ''Estimated Prophet''...

I dig Bobby's beard in that video...usually Weir was always clean shaven back then...

thanks for the video clip, that was pretty awesome!

 

well that particular sound, sounds like a mix of a mu-tron III and an MXR Phaser....

 

Yep, Mutron III w envelope filter.

Thanks for the great video...Bobby with a beard, Jerry is really dancing around and Micky looks like a porn star with his mustache!

 

try electro harmonix qtron, or wah-wah....especally qtron

 

I prefer the Q-tron, but any envelope filter can give a similar effect.

 

I can get a sound similar to this with my cry baby and filter.
Thanks, great tune.