On Wed, Mar 30, 2005 at 09:23:26 -0800, Brad Fuller wrote: > >>Thanks Steve, I'm trying your "triple band parametric" and I can't get > >>the High-shelving freq to cut off fast enough. Perhaps I have the args > >>wrong: I have the last args as: -70 5536 1, but it seems a gentle > >>decline. Am I doing something wrong? I'd like to have a brick at 5k. Can > >>that be done? > >> > >> > > > >You can push up the 1 to a higher number, but it will effect the response > >near the cuttoff, that may not matter to much for your situation. > > > > > I fooled around with the numbers, but I can't quite get what I want. > Maybe you can help me. what I want to do is have a brick-wall at 5500Hz > (with some adjustments below it, though I think I've got that with the > settings of the parametric bands.) Do you think your hi-shelf with a > gain of -70 and a slope of (input number here) is just too shallow of a > slope to this filter for a wall? You wont be able to get a really serious brickwall with the highshelf, its only 2nd order IIRC, you could try stacking a load of lowpass filters set to the same cutoff, but you will get some sreious phase shift I think. Brickwall filters, by thier very nature tend to have side effects or be very CPU intensive. - Steve
