Recently I saw a demo of CrossLite+ a tool to develop DSP filters. I was hoping I could ask for a free equivalent besides REW. I've looked at REW and it seems to do everything completely backwards from what I expect, and very much tied to specific DSP platforms.
I want something that lets me draw a couple of filters and examine how the filters behave in terms of phase and time. For instance, have 2 "ideal" drivers, put them through an arbitrary LP and HP filter and see what this means to the impulse, phase and group delay. I'm afraid all the wordy explanations I read are not sticking with me, so I'm hoping for something interactive with graphs that let me feel the changes.
Thank you,
Erik
I want something that lets me draw a couple of filters and examine how the filters behave in terms of phase and time. For instance, have 2 "ideal" drivers, put them through an arbitrary LP and HP filter and see what this means to the impulse, phase and group delay. I'm afraid all the wordy explanations I read are not sticking with me, so I'm hoping for something interactive with graphs that let me feel the changes.
Thank you,
Erik
It has active filter options. I don't regularly use them myself (occasionally) as I'm a brontosaurus & I like working with passive filters, but it ain't lacking. Kimmo's summary should give you some background: https://kimmosaunisto.net/Software/Software.html
Since he's constantly adding to / expanding it, I suspect additional capabilities will be bolted on as / when he gets chance / inclination / the Earth rotates. 😉
Since he's constantly adding to / expanding it, I suspect additional capabilities will be bolted on as / when he gets chance / inclination / the Earth rotates. 😉
Unfortunately DSP world is not standardized so many DSP gear manufacturers and app. programmers have their own parameter spec. combination and transfer functions for different filter types. Butterworth LP+HP and Linkwitz-Riley LP+HP have standard transfer function we can trust in >99 % cases, but that's it. So also VituixCAD has selectable DSP in Options window. "Analog" equivalent is just one of them, but that's probably what you're searching for.
P.S. Feature list was a bit outdated, but just updated.
I use Python and scipy.signal library for DSP experimentation (or analog filter design) - it pretty much covers all the MatLab functionality for signal processing. If you have experience with Python its definitely worth looking at, free, portable, fast and of course flexible as you are programming it!