Bug 1275 - No preview in Spectral edit effects
Introduces a new type 'spectral' t Nyquist plug-ins
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@ -1,13 +1,13 @@
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;nyquist plug-in
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;version 4
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;type process
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;type process spectral
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;name "Spectral edit multi tool"
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;action "Filtering..."
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;author "Paul Licameli"
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;copyright "Released under terms of the GNU General Public License version 2"
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;; SpectralEditMulti.ny by Paul Licameli, November 2014.
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;; Updated to version 4 by Steve Daulton November 2014.
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;; Updated by Steve Daulton 2014 / 2015.
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;; Released under terms of the GNU General Public License version 2:
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;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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@ -22,6 +22,7 @@
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(let* ((f0 (get '*selection* 'low-hz))
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(f1 (get '*selection* 'high-hz))
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(fc (get '*selection* 'center-hz))
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(bw (get '*selection* 'bandwidth))
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(tn (truncate len))
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(rate (snd-srate sig))
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(transition (truncate (* 0.01 rate))) ; 10 ms
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@ -30,14 +31,27 @@
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(breakpoints (list t1 1.0 t2 1.0 tn))
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(env (snd-pwl 0.0 rate breakpoints)))
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(cond
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((not (or f0 f1)) (throw 'error-message "Please select frequencies."))
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((and f0 f1 (= f0 f1)) (throw 'error-message
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"Bandwidth is zero.\nPlease select a frequency range."))
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((not (or f0 f1)) ; This should never happen for a 'spectral' effect.
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(throw 'error-message "Please select frequencies."))
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((and f0 f1 (= f0 f1))
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(throw 'error-message
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(format nil "~aBandwidth is zero (the upper and lower~%~
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frequencies are both ~a Hz).~%~
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Please select a frequency range."
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p-err f0)))
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;; Biqud filter fails if centre frequency is very low and bandwidth very high.
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;; 'Magic numbers' 10 Hz and 10 octaves are experimental.
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((and f0 (< f0 10) (or (not bw)(> bw 10)))
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(throw 'error-message
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(format nil "~aNotch filter parameters cannot be applied.~%~
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Try increasing the low frequency bound~%~
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or reduce the filter 'Width'."
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p-err)))
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;; low pass frequency is above Nyquist so do nothing
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((and (not f1) (>= f0 (/ *sound-srate* 2.0)))
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nil)
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;; notch frequency is above Nyquist so do nothing
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((and (and f0 f1) (>= fc (/ *sound-srate* 2.0)))
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((and f0 f1 (>= fc (/ *sound-srate* 2.0)))
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nil)
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;; high-pass above Nyquist so fade to silence
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((and (not f0) (>= f1 (/ *sound-srate* 2.0)))
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@ -46,4 +60,5 @@
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(prod (diff 1.0 env) sig))))))
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(catch 'error-message
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(setf p-err "Error.\n")
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(multichan-expand #'result *track*))
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@ -1,41 +1,28 @@
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;nyquist plug-in
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;version 4
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;type process
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;type process spectral
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;preview linear
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;name "Spectral edit parametric EQ..."
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;action "Filtering..."
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;author "Paul Licameli"
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;copyright "Released under terms of the GNU General Public License version 2"
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;; SpectralEditParametricEQ.ny by Paul Licameli, November 2014.
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;; Updated to version 4 by Steve Daulton November 2014.
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;; Updated by Steve Daulton 2014 / 2015.
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;; Released under terms of the GNU General Public License version 2:
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;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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;control control-gain "Gain (dB)" real "" 0 -24 24
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(setf control-gain (min 24 (max -24 control-gain))) ; excessive settings may crash
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(defmacro validate (hz)
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"Ensure frequency is below Nyquist"
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`(setf ,hz (max 0 (min (/ *sound-srate* 2.0) ,hz))))
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(defun wet (sig gain f0 f1)
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;; (re)calculate bw and fc to ensure we do not exceed Nyquist frequency
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(validate f0)
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(validate f1)
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(let ((fc (sqrt (* f0 f1)))
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(bw (/ (log (/ f1 f0))
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(log 2.0))))
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(when (= bw 0)
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(throw 'error-message (format nil "~aBandwidth is zero.~%Select a frequency range." p-err)))
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(eq-band sig fc gain (/ bw 2))))
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(defun wet (sig gain fc bw)
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(eq-band sig fc gain (/ bw 2)))
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(defun result (sig)
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(let*
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((f0 (get '*selection* 'low-hz))
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(f1 (get '*selection* 'high-hz))
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(fc (get '*selection* 'center-hz))
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(bw (get '*selection* 'bandwidth))
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(tn (truncate len))
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(rate (snd-srate sig))
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(transition (truncate (* 0.01 rate))) ; 10 ms
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@ -44,18 +31,34 @@
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(breakpoints (list t1 1.0 t2 1.0 tn))
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(env (snd-pwl 0.0 rate breakpoints)))
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(cond
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((not (or f0 f1))
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(throw 'error-message (format nil "~aPlease select frequencies." p-err)))
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((or (not f0) (= f0 0))
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(throw 'error-message (format nil "~aLow frequency is undefined." p-err)))
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((not (or f0 f1)) ; This should never happen for a 'spectral' effect.
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(throw 'error-message (format nil "~aPlease select frequencies." p-err)))
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((not f0)
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(throw 'error-message (format nil "~aLow frequency is undefined." p-err)))
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((not f1)
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(throw 'error-message (format nil "~aHigh frequency is undefined." p-err)))
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;; If seleted frequency band is above Nyquist, do nothing.
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((< f0 (/ *sound-srate* 2.0))
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(sum (prod env (wet sig control-gain f0 f1)) (prod (diff 1.0 env) sig))))))
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(throw 'error-message (format nil "~aHigh frequency is undefined." p-err)))
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((and fc (= fc 0))
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(throw 'error-message (format nil "~aCenter frequency must be above 0 Hz." p-err)))
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((and f1 (> f1 (/ *sound-srate* 2)))
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(throw 'error-message
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(format nil "~aFrequency selection is too high for track sample rate.
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For the current track, the high frequency setting cannot~%~
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be greater than ~a Hz"
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p-err (/ *sound-srate* 2))))
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((and bw (= bw 0))
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(throw 'error-message
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(format nil "~aBandwidth is zero (the upper and lower~%~
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frequencies are both ~a Hz).~%~
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Please select a frequency range."
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p-err f0)))
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;; If centre frequency band is above Nyquist, do nothing.
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((and fc (>= fc (/ *sound-srate* 2.0)))
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nil)
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(t (sum (prod env (wet sig control-gain fc bw))
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(prod (diff 1.0 env) sig))))))
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(catch 'error-message
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(setf p-err "")
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(if (= control-gain 0) ; Allow dry preview
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"Gain is zero. Nothing to do."
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(multichan-expand #'result *track*)))
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(setf p-err "Error.\n")
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(if (= control-gain 0)
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nil ; Do nothing
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(multichan-expand #'result *track*)))
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@ -1,6 +1,6 @@
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;nyquist plug-in
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;version 4
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;type process
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;type process spectral
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;preview linear
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;name "Spectral edit shelves..."
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;action "Filtering..."
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@ -9,35 +9,31 @@
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;; SpectralEditShelves.ny by Paul Licameli, November 2014.
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;; Updated to version 4 by Steve Daulton November 2014.
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;; Updated by Steve Daulton 2014 / 2015.
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;; Released under terms of the GNU General Public License version 2:
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;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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;control control-gain "Gain (dB)" real "" 0 -24 24
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(setf control-gain (min 24 (max -24 control-gain))) ; excessive settings may crash
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(defmacro validate (hz)
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"Ensure frequency is below Nyquist"
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`(setf ,hz (max 0 (min (/ *sound-srate* 2.0) ,hz))))
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"If frequency is above Nyquist, don't use it"
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`(if (or (>= ,hz (/ *sound-srate* 2.0))
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(<= ,hz 0))
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(setf ,hz nil)))
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(defun mid-shelf (sig lf hf gain)
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"Combines high shelf and low shelf filters"
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(let* ((invg (- gain)))
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(let ((invg (- gain)))
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(scale (db-to-linear gain)
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(eq-highshelf (eq-lowshelf sig lf invg)
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hf invg))))
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(defun wet (sig gain f0 f1)
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"Apply appropriate filter"
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(cond
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((not f0) (eq-lowshelf sig (validate f1) gain))
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((not f1) (eq-highshelf sig (validate f0) gain))
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(t
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(validate f0)
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(validate f1)
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(when (= f0 f1)
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(throw 'error-message "Please select a frequency range."))
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(mid-shelf sig f0 f1 gain))))
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((not f0) (eq-lowshelf sig f1 gain))
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((not f1) (eq-highshelf sig f0 gain))
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(t (mid-shelf sig f0 f1 gain))))
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(defun result (sig)
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(let*
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@ -51,24 +47,26 @@
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(breakpoints (list t1 1.0 t2 1.0 tn))
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(env (snd-pwl 0.0 rate breakpoints)))
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(cond
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((not (or f0 f1))
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((not (or f0 f1)) ; This should never happen for a 'spectral' effect.
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(throw 'error-message (format nil "~aPlease select frequencies." p-err)))
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; shelf is above Nyquist frequency so do nothing
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((and f0 (>= f0 (/ *sound-srate* 2.0))) nil)
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(T (sum (prod env (wet sig control-gain f0 f1))
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(prod (diff 1.0 env) sig))))))
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;; Frequency selection must be between 0 Hz and Nyquist.
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(if (and (get '*selection* 'low-hz)
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(<= (get '*selection* 'low-hz) 0))
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(remprop '*selection* 'low-hz))
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(if (and (get '*selection* 'high-hz)
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(>= (get '*selection* 'high-hz)(/ *sound-srate* 2)))
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(remprop '*selection* 'high-hz))
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((and f0 (>= f0 (/ *sound-srate* 2.0)))
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; Shelf is above Nyquist frequency so do nothing.
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nil)
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((and f0 f1 (= f0 f1))
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(throw 'error-message
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(format nil "~aBandwidth is zero (the upper and lower~%~
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frequencies are both ~a Hz).~%~
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Please select a frequency range."
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p-err f0)))
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(T (if f0 (validate f0))
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(if f1 (validate f1))
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(if (not (or f0 f1)) ; 'validate' may return nil
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nil ; Do nothing
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(sum (prod env (wet sig control-gain f0 f1))
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(prod (diff 1.0 env) sig)))))))
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(catch 'error-message
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(setf p-err "")
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(if (= control-gain 0) ; Allow dry preview
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"Gain is zero. Nothing to do."
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(multichan-expand #'result *track*)))
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(setf p-err "Error.\n")
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(if (= control-gain 0)
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nil ; Do nothing
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(multichan-expand #'result *track*)))
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@ -377,6 +377,34 @@ bool NyquistEffect::SetAutomationParameters(EffectAutomationParameters & parms)
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bool NyquistEffect::Init()
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{
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// As of Audacity 2.1.2 rc1, 'spectral' effects are allowed only if
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// the selected track(s) are in a spectrogram view, and there is at
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// least one frequency bound and Spectral Selection is enabled for the
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// selected track(s) - (but don't apply to Nyquist Prompt).
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if (!mIsPrompt && mIsSpectral) {
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AudacityProject *project = GetActiveProject();
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bool bAllowSpectralEditing = true;
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SelectedTrackListOfKindIterator sel(Track::Wave, project->GetTracks());
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for (WaveTrack *t = (WaveTrack *) sel.First(); t; t = (WaveTrack *) sel.Next()) {
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if (t->GetDisplay() != WaveTrack::Spectrum ||
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!(t->GetSpectrogramSettings().SpectralSelectionEnabled())) {
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bAllowSpectralEditing = false;
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break;
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}
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}
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if (!bAllowSpectralEditing || ((mF0 < 0.0) && (mF1 < 0.0))) {
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wxMessageBox(_("To use 'Spectral effects', enable 'Spectral Selection'\n"
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"in the track Spectrogram settings and select the\n"
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"frequency range for the effect to act on."),
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_("Error"), wxOK | wxICON_EXCLAMATION | wxCENTRE);
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return false;
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}
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}
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if (!mIsPrompt && !mExternal)
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{
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//TODO: If we want to auto-add parameters from spectral selection,
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@ -621,27 +649,25 @@ bool NyquistEffect::Process()
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wxString centerHz = wxT("nil");
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wxString bandwidth = wxT("nil");
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const WaveTrack::WaveTrackDisplay display = mCurTrack[0]->GetDisplay();
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const bool bAllowSpectralEditing =
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(display == WaveTrack::Spectrum) &&
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mCurTrack[0]->GetSpectrogramSettings().SpectralSelectionEnabled();
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if (bAllowSpectralEditing) {
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#if defined(EXPERIMENTAL_SPECTRAL_EDITING)
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if (mF0 >= 0.0) {
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lowHz.Printf(wxT("(float %s)"), Internat::ToString(mF0).c_str());
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}
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if (mF0 >= 0.0) {
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lowHz.Printf(wxT("(float %s)"), Internat::ToString(mF0).c_str());
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}
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if (mF1 >= 0.0) {
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highHz.Printf(wxT("(float %s)"), Internat::ToString(mF1).c_str());
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}
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if (mF1 >= 0.0) {
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highHz.Printf(wxT("(float %s)"), Internat::ToString(mF1).c_str());
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}
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if ((mF0 >= 0.0) && (mF1 >= 0.0)) {
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centerHz.Printf(wxT("(float %s)"), Internat::ToString(sqrt(mF0 * mF1)).c_str());
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}
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if ((mF0 >= 0.0) && (mF1 >= 0.0)) {
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centerHz.Printf(wxT("(float %s)"), Internat::ToString(sqrt(mF0 * mF1)).c_str());
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}
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if ((mF0 > 0.0) && (mF1 >= mF0)) {
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bandwidth.Printf(wxT("(float %s)"), Internat::ToString(log(mF1 / mF0) / log(2.0)).c_str());
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if ((mF0 > 0.0) && (mF1 >= mF0)) {
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// with very small values, bandwidth calculation may be inf.
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// (Observed on Linux)
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double bw = log(mF1 / mF0) / log(2.0);
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if (!isinf(bw)) {
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bandwidth.Printf(wxT("(float %s)"), Internat::ToString(bw).c_str());
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}
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}
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@ -1346,6 +1372,9 @@ void NyquistEffect::Parse(wxString line)
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else if (tokens[1] == wxT("analyze")) {
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mType = EffectTypeAnalyze;
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}
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if (len >= 3 && tokens[2] == wxT("spectral")) {;
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mIsSpectral = true;
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}
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return;
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}
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@ -1582,6 +1611,7 @@ bool NyquistEffect::ParseProgram(wxInputStream & stream)
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mIsSal = false;
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mControls.Clear();
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mCategories.Clear();
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mIsSpectral = false;
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mFoundType = false;
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while (!stream.Eof() && stream.IsOk())
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@ -180,6 +180,7 @@ private:
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bool mCompiler;
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bool mIsSal;
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bool mExternal;
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bool mIsSpectral;
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/** True if the code to execute is obtained interactively from the user via
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* the "Nyquist Prompt", false for all other effects (lisp code read from
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* files)
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