[sdiy] Anybody Know of FREE Frequency Plotting Software?

[Ken Elhardt]

> Hi Ken,
> the pulse method is very limited by the quality of your DAC and the
> analog stage following it, the sweep gives much more solid results.
>
> You will also find that the phase response is much more interesting
> than the frequency response.

Yes, I'd probably rather use the sine sweep method than the impulse
response method. However, I don't care about phase. I'm wanting to get
freq plots of vocoders, phase shifters, and filter banks, so I can see
where the frequencies of the peaks and dips are at located at. But the
impulse response method can give me some info I might want, like
whether a piece of gear is using a FIR filter or an IIR filter. That's
something I want to find out about the 12 band filter bank in my
JP-8080. That damn filter bank has such a slow lag time it is unusable
for percussive sounds.

-Elhardt