Formatting Differences

Brian,

I took a look at your code and listened to your component. From what I can tell, the equations look correct. The plug-in seems to work as expected. A majority of the energy is going to be in the low frequency and as you decrease bandwidth you get a higher Q (more gain). So when using your plugin with low resonant frequency and narrow BW, I would expect it to be clipping hard. I could be wrong here, but your plug-in acts like mine.

Thanks a lot, Doug!

Why would there be more energy in the low frequencies as you decrease bandwidth? I was testing it w/ white noise (so there should be equal energy everywhere) and I was still experiencing these effects. I can kind of understand why it's getting louder as you tighten the Q (because you're putting the poles very close 1) but there should be a lot less energy getting being passed at the same time... Also, shouldn't the normalizing factor prevent most of this from happening? I found that mine behaved a little bit more like I thought it should when I took away A0, which is a little weird IMO.

I'm sorry, I didn't make that completely clear. You're right, there is no change is the energy as your decrease BW, but there is an increase in Q, i.e. gain. I was just saying, in general, for pop/rock/rap music there is a lot more low frequency content. The white noise test was a good idea. Yeah, I was wondering about the inclusion of the gain factor, maybe Colby can make some sense of this. I would suspect that this reson filter is far from optimal and we might have to expect suboptimal performance over the entire audio range.