Well, you’re the guy who would know. And it’s not even mentioned on your site, other than it being tossed in for free with a Deluxe Big Muff. I’m not interested in screwing with it, unless someone like you says anything is better than the 4558 in there now. You know how it is; we’re all Burr-Brown crazy. But an attack mod might still be cool. Even in a basic Dyna Comp the trim pot inside adjusts the attack, and the Nano version has it as well. The more I think about it, the more I realize I should relax and just enjoy it. It is pretty cool; not really noisy, the treble boost switch reminds me of a Boss CS-1, and it really works.
I don’t know what I wanted with any mod advice. Maybe being told an upgraded IC would make it a little quieter? I guess I just got excited and wanted to know everything possible in one shot.
I’ll apologize again for being too nosy and whiny. But man, I still want to know why this compressor isn’t poping up on many sites. Tone Frenzy has a really good sound clip. Between that and Discogreq, it seems we’re the only people who know about it. And I know nothing. But not for long, if I have my way. Thanks for the slap in the head. I’m back to Earth now. Time to grab a Strat, my ‘new’ Soul Preacher, and get my Nile Rogers on.

I also have an old Boss CS-1, and it has the treble boost switch as well. I don’t really use that part, unless the whole signal just sounds like it lost some top end.
I never really thought about the adaptor issue, either. I guess if the adaptor isn’t well filtered or regulated, it can be a problem. But you could add a simple filter. I suppose it would be something like a 100-ohm resistor from the AC jack to the circuit board, and a 220uF or a 470uF capacitor mounted from that B+ point to ground.
You know, I just looked at the one schematic I can find, and there already is a filter; a 220-ohm resistor and a 100uF capacitor. Maybe you could bump up that capacitor. It would be a cheap and easy experiment. But if you have a costly power supply, it should be filtered and regulated to start with. I guess a plain adaptor that was sold with a calculator would be a problem, as you don’t have to listen to a calculator. That’s one reason I stopped buying the $2.95 adaptors from my local computer surplus store.