On 23 Dec 2009, at 19:56, Ian Fritz wrote: > (A single pole filter changes a step into a ramp, no?) Ugh, no. A single pole filter changes a step into a weird curvy thing that's nearer a shark's fin than a ramp. But like you said, it's a matter of taste.... T. PS: I like the F-V idea. Much better than the single pole filter idea!