Awesome! I would like to be able to see the phase response, but since most of the time the user is only interested in the magnitude response, I think it should be something you can switch to with a message.
.mmb On Wed, Feb 16, 2011 at 1:53 AM, Hans-Christoph Steiner <[email protected]>wrote: > > Ok, I got it working in a limited way as a Pd object and I was controlling > my first filter against noise! Good fun. You can still run the .tcl file as > a standalone GUI for dev work. Get it from my git: > > https://github.com/pd-projects/filterview > > It would be quite nice if the phase was drawn as a thin line over the > magnatude graph. What do you think? > > .hc > > > On Feb 15, 2011, at 6:31 PM, Mike Moser-Booth wrote: > > Hey Hans, > > Here's an update of filterview. There are now procs for the following > filters: > > lowpass > highpass > allpass > bandpass > resonant > peaking > highshelf > lowshelf > > I've added some lines to show the phase response (you have to comment out > line 135 and uncomment 136 to see it). I also adjust the bandwidth > calculations so the handles sit where they should (i.e. -3dB for > bandpass/notch/etc., 1/2 power for peaking/shelf). > > btw, the frequency axis is log-scaled, though it could probably be improved > a little. I sort of took a Pd approach to it by making an mtof proc, so the > x-axis gets scaled to linear midi notes and converted to log-frequencies. > :-) There might be a simpler way to do it. It also doesn't go all the way > down to 0 Hz, because doing that with this approach causes the lowest > frequencies to take up too much of the graph. I think Max gets around it by > using a more compressed scale below 1-2 Hz. > > .mmb > > On Thu, Feb 10, 2011 at 12:39 AM, Mike Moser-Booth > <[email protected]>wrote: > >> Sure, I can throw the others together. Now that one is done the rest >> should fall into place pretty easily. It might take me a couple of days to >> get to it, though. >> >> .mmb >> >> On Wed, Feb 9, 2011 at 11:47 PM, Hans-Christoph Steiner <[email protected]>wrote: >> >>> >>> That's awesome, thanks! I committed it under your name: >>> >>> https://github.com/pd-projects/filterview >>> >>> I'd like to implement all of the relevant filters, which algorithms >>> should I use? Or even better, perhaps you want to take a crack at it while >>> I figure out how to display the x/frequency on a log scale :-D >>> >>> .hc >>> >>> >>> -- >> Mike Moser-Booth >> [email protected] >> > > > > -- > Mike Moser-Booth > [email protected] > <filterview.mmb.tcl.zip> > > > > > > > > ---------------------------------------------------------------------------- > > Programs should be written for people to read, and only incidentally for > machines to execute. > - from Structure and Interpretation of Computer Programs > > -- Mike Moser-Booth [email protected]
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