[sdiy] Korg Delta filter...resonance!

[Ordeish at aol.com]

 Hi all, just picked up my old Korg Delta from girlfriends parents house. Its always been one of my favs. Now I am wanting to know why. 

1: I notice that when turning up the resonance the volume also increases. Why is this? with my others it is the exact oppposite.

2: having resonance up and an inverted envelope creates some really hi pitched strange phasing type effects. what goes on with that?

Just wondering.
Also wondering if the EFM Delta module is faithful to this wonderfully odd filter.

thanks
edward