MOTM

My Akai sampler has a phaser effect with feedback control that I 
think is pretty cool.  I'm curious what I could do to my 410 to give 
it feedback control too or whether this makes sense at all.  

I was looking through the archives and saw mention of peopling using 
a 'feedback loop' to generate more resonance out of the 410.  Do I 
have to have a mult to create a feedback loop or is there another way?

Thanks,
-Matt