/usr/share/audacity/plug-ins/lowpass.ny is in audacity-data 2.1.2-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 | ;nyquist plug-in
;version 4
;type process
;preview linear
;name "Low Pass Filter..."
;action "Performing Low Pass Filter..."
;author "Dominic Mazzoni"
;copyright "Released under terms of the GNU General Public License version 2"
;; lowpass.ny by Dominic Mazzoni
;; Last updated August 2015
;; Released under terms of the GNU General Public License version 2:
;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html .
;control frequency "Frequency (Hz)" float-text "" 1000 0 nil
;control rolloff "Rolloff (dB per octave)" choice " 6 dB,12 dB,24 dB,36 dB,48 dB" 0
(cond
((< frequency 0.1) "Frequency must be at least 0.1 Hz.")
((>= frequency (/ *sound-srate* 2.0))
(format nil "Error:~%~%Frequency (~a Hz) is too high for track sample rate.~%~%~
Track sample rate is ~a Hz~%~
Frequency must be less than ~a Hz."
frequency
*sound-srate*
(/ *sound-srate* 2.0)))
(T (funcall (nth rolloff '(lp lowpass2 lowpass4 lowpass6 lowpass8))
*track* frequency)))
|