From: David R. Sky <sky@wa...> - 2004-07-25 12:52:43
I've got a couple questions about Nyquist plug-ins.
1. When I applied the Nyquist notch2 filter to a piece of music,
Nyquist constantly returned an error message. Even when I applied
a Nyquist comb filter (below) at 440 Hz to the point where that
frequency was resonating, the notch2 filter (applied to 440 Hz too)
still got me an error message.
In Audacity, the music was labelled as stereo - when I split the
stereo and then applied the notch2 filter, it worked.
What's going on here? Why does one Nyquist plug-in fail to work on
the stereo track yet another one does work?
2. In the comb filter written in dspprims.lsp, two variables are
called for, decay and hz. I wasn't sure what to call the units in
the decay portion of the plug-in, what should it be? (The higher
this setting is when I apply the comb filter, the stronger it
;name "Comb filter"
;action "Performing Comb filter..."
;info Performs comb filter.
;control decay "Decay/feedback" real "(units?)" 0.025 0.000 0.100
;control combfreq "Comb filter frequency" real "Hz" 440.0 0.0 500.0
(comb s decay combfreq)