Im pretty sure you want to keep it on LP (Im at work, could be wrong)
but other than that, its really variable. You really want to have a strong signal going to it, and set it so the envelope just barely opens on your hardest attack. this gives you the buwah sound you are going for. Too much and you get a "bugedah" sounding quack.
The thing with these damn things is what makes them so cool, makes them a bit difficult. There is really no concrete setting. You have to play with it.
Information is not knowledge. Knowledge is not wisdom. Wisdom is not beauty. Beauty is not love. Love is not music. Music is the best.- the girl from the bus