MV ZDF BP1 best for spectrum analyzers (filtered)

[wlangfor@uoguelph.ca]

Hi all, I was working with various forms of spectrum analyzers which have bands with the old school bar graph style. Anyways, I at one time had never worked with fft and tried to make one. It went horribly wrong, but, lately I tried to re-hash the idea.

After some practicing it's not so hard and I was able to get a really good response from it. I'd tried many other filter types and the only reliable and low cpu cost was the zdf bp1.

So, thanks again to Martin for those great filters. He'd also posted about an interesting Goertzel semitone analyzer. I'm confident that I can optimize them in a multi band analyzer (up to 34 bands) that should be 0.35% CPU. In contrast 18 bands with the ZDF uses 0.42% CPU.

Changing the topic, I've also been working on a version that grabs data from the graph prim and fft magnitude. It so far seems to be the most predictable, and I came up with a method that mimics resonance.

But the real trick for all of these methods you all may wish to try is to one use slides and set the step to 1. Furthermore, make a really efficient compressor, and set the attack and release fairly low. Once you have the results from the analyzer will be very predictable.

GL analyzing