Updated Spectral effects to v4 plugins and added GPL v2 license information (with agreement from Paul Licameli).

plug-ins/SpectralEditMulti.ny

@@ -1,35 +1,40 @@
 ;nyquist plug-in
-;version 3
+;version 4
 ;type process
 ;name "Spectral edit multi tool"
-;action "Calculating..."
+;action "Filtering..."
 ;author "Paul Licameli"
-;copyright "Unknown"
+;copyright "Released under terms of the GNU General Public License version 2"
+
+
+;; SpectralEditMulti.ny by Paul Licameli, November 2014.
+;; Updated to version 4 by Steve Daulton November 2014.
+;; Released under terms of the GNU General Public License version 2:
+;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 
 (defun wet (sig)
-  (cond
-   ((not (or *f0* *f1*)) (throw 'error-message "Please select frequencies"))
-   ((not *f0*) (highpass2 sig *f1*))
-   ((not *f1*) (lowpass2 sig *f0*))
-   (t (if (= *f0* *f1*)
-          (throw 'error-message "Band width is undefined")
-          (let*
-              ((fc (sqrt (* *f0* *f1*)))
-               (width (abs (- *f1* *f0*)))
-               (q (/ fc width)))
-            (notch2 sig fc q))))))
+  (let ((f0 (get '*selection* 'low-hz))
+        (f1 (get '*selection* 'high-hz))
+        (fc (get '*selection* 'center-hz)))
+    (cond
+      ((not (or f0 f1)) (throw 'error-message "Please select frequencies."))
+      ((not f0) (highpass2 sig f1))
+      ((not f1) (lowpass2 sig f0))
+      ((= f0 f1) (throw 'error-message "Bandwidth is zero.\nSelect a frequency range."))
+      (T (let ((q (/ fc (- f1 f0))))
+           (notch2 sig fc q))))))
 
 (defun result (sig)
-  (let*
-      ((tn (truncate len))
-       (rate (snd-srate sig))
-       (transition (truncate (* 0.01 rate)))
-       (t1 (min transition (/ tn 2)))
-       (t2 (max (- tn transition) (/ tn 2)))
-       (breakpoints (list t1 1.0 t2 1.0 tn))
-       (env (snd-pwl 0.0 rate breakpoints)))
+  (let* ((tn (truncate len))
+        (rate (snd-srate sig))
+        (transition (truncate (* 0.01 rate))) ; 10 ms
+        (t1 (min transition (/ tn 2)))        ; fade in length (samples)
+        (t2 (max (- tn transition) (/ tn 2))) ; length before fade out (samples)
+        (breakpoints (list t1 1.0 t2 1.0 tn))
+        (env (snd-pwl 0.0 rate breakpoints)))
     (sum (prod env (wet sig)) (prod (diff 1.0 env) sig))))
 
-(catch 'error-message
-  (multichan-expand #'result s))
-
+(if (string-not-equal (get '*TRACK* 'VIEW) "spectrogram"  :end1 4 :end2 4)
+    "Use this effect in the 'Spectrogram'\nor 'Spectrogram (log f)' view."
+    (catch 'error-message
+      (multichan-expand #'result *track*)))