I just picked up this crazy digi-preamp rack mount unit(for free). Its got some crazy synth tones, and the thing I like the most about it is the evelope filter. the previous two owners didnt really learn how to use it, and since I dont have the manual I was wondering if any one has this beast. there are a bunch of abreviations that I figured out, and ways to combine and chain different effects. I want to learn how every thing works...so I can do some good with it, and cut out the bad. I dont really like the sampling rate, it looks pretty old, so it is probably low. it kills the tone on my bassman.(heck, even boss analog pedals make a difference on the tone on my bassman) Maybe I will make a hard bypass, and just use it on occasion.