this plugin contains the filter found in the excellent mos6581 emulation package resid.
resid can be found at http://www.geocities.com/SiliconValley/Lakes/5147/resid/index.html
the filter is the exact same one found in resid, but with an extended cutoff and resonance range.
sidfilter has three outputs: highpass (12 db/oct), lowpass (12 db/oct) and bandpass
(6 db/oct). sidfilter can be set to be any one of these, but you can also mix all of them together to create a filter with really fucked frequency response (a notch filter can be created in this way by mixing the highpass and lowpass outputs).
sidfilter may go completely unstable if the cutoff is set too high (over 8khz at 44.1khz sampling rate) while the resonance is near 1. basically, the higher the resonance, the higher you can set the cutoff frequency.
maximum cutoff frequency and maximum resonance are adjustable in the attributes menu.
the rest should be self-explanatory.
though sidfilter has worked ok for me the times i tested it, it may contain bugs.
since this was made just to try making a buzz machine, i don't think i'll update it again, unless there's a really stupid bug or something in it.
