mirror of
https://github.com/cookiengineer/audacity
synced 2025-11-04 08:04:06 +01:00
a06e561cb7
For shipped plug-ins, the version number is the same as the Audacity release version when the plug-in was last modified.
58 lines
1.6 KiB
Common Lisp
58 lines
1.6 KiB
Common Lisp
$nyquist plug-in
|
|
$version 3
|
|
$type process
|
|
$preview linear
|
|
$name (_ "Tremolo")
|
|
$manpage "Tremolo"
|
|
$debugbutton disabled
|
|
$action (_ "Applying Tremolo...")
|
|
$author (_ "Steve Daulton")
|
|
$release 2.3.0
|
|
$copyright (_ "Released under terms of the GNU General Public License version 2")
|
|
|
|
;; tremolo.ny by Steve Daulton (www.easyspacepro.com) July 2012.
|
|
;; Based on Tremolo by Dominic Mazzoni and David R. Sky."
|
|
|
|
;; Released under terms of the GNU General Public License version 2:
|
|
;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|
;;
|
|
;; For information about writing and modifying Nyquist plug-ins:
|
|
;; https://wiki.audacityteam.org/wiki/Nyquist_Plug-ins_Reference
|
|
|
|
$control wave (_ "Waveform type") choice (
|
|
(_ "Sine")
|
|
(_ "Triangle")
|
|
(_ "Sawtooth")
|
|
("InverseSawtooth" (_ "Inverse Sawtooth"))
|
|
(_ "Square")
|
|
) 0
|
|
$control phase (_ "Starting phase (degrees)") int "" 0 -180 180
|
|
$control wet (_ "Wet level (percent)") int "" 40 1 100
|
|
$control lfo (_ "Frequency (Hz)") float-text "" 4 0.001 1000
|
|
|
|
; Convert % to linear
|
|
(setq wet (/ wet 200.0))
|
|
|
|
; set tremolo waveform
|
|
(setq waveform
|
|
(abs-env
|
|
(case wave
|
|
(0 *sine-table*)
|
|
(1 *tri-table*)
|
|
; sawtooth
|
|
(2 (maketable (pwlv -1 0.995 1 1 -1)))
|
|
; inverse sawtooth
|
|
(3 (maketable (pwlv -1 0.005 1 1 -1)))
|
|
; square
|
|
(4 (maketable (pwlv -1 0.005 1 0.5 1 0.505 -1 1 -1))))))
|
|
|
|
;;; Generate modulation wave
|
|
(defun mod-wave (level)
|
|
(when (= wave 0)
|
|
(setq phase (- phase 90)))
|
|
(sum (- 1 level)
|
|
(mult level
|
|
(osc (hz-to-step lfo) 1.0 waveform phase))))
|
|
|
|
(mult s (mod-wave wet))
|