diff --git a/Makefile.am b/Makefile.am
index b7a945681..52bde2d63 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -84,7 +84,6 @@ nobase_dist_pkgdata_DATA = \
    plug-ins/SpectralEditShelves.ny \
    plug-ins/StudioFadeOut.ny \
    plug-ins/tremolo.ny \
-   plug-ins/vocalremover.ny \
    plug-ins/vocalrediso.ny \
    plug-ins/vocoder.ny \
    $(NULL)
diff --git a/Makefile.in b/Makefile.in
index 3c4a848af..92ae33483 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -602,7 +602,6 @@ nobase_dist_pkgdata_DATA = \
    plug-ins/SpectralEditShelves.ny \
    plug-ins/StudioFadeOut.ny \
    plug-ins/tremolo.ny \
-   plug-ins/vocalremover.ny \
    plug-ins/vocalrediso.ny \
    plug-ins/vocoder.ny \
    $(NULL)
diff --git a/plug-ins/vocalrediso.ny b/plug-ins/vocalrediso.ny
index 3752bd23f..b451fc3e9 100644
--- a/plug-ins/vocalrediso.ny
+++ b/plug-ins/vocalrediso.ny
@@ -6,24 +6,27 @@ $name (_ "Vocal Reduction and Isolation")
 $manpage "Vocal_Reduction_and_Isolation"
 $action (_ "Applying Action...")
 $author (_ "Robert Haenggi")
-$release 2.3.0
+$release 2.3.3
 $copyright (_ "Released under terms of the GNU General Public License version 2")
-
-;; vocrediso.ny, based on rjh-stereo-tool.ny
+;;categories "http://lv2plug.in/ns/lv2core#MixerPlugin"
 ;;
-;; Plug-in version 1.56, June 2015
-;; Requires Audacity 2.1.1  or later, developed under Audacity 2.1.1
-
+;; vocrediso.ny, based on rjh-stereo-tool.ny
 ;; Released under terms of the GNU General Public License version 2:
 ;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
+;; Plug-in version 1.7, May  2017
+;; added legacy Vocal Remover since V. 1.56, 06-2015
+;; Requires Audacity 2.1.1  or later, developed under Audacity 2.2.0 Alpha
+;; requires Audacity 2.2.0 for embedded help (button)
 ;;
 ;; For information about writing and modifying Nyquist plug-ins:
 ;; https://wiki.audacityteam.org/wiki/Nyquist_Plug-ins_Reference
 
 $control action (_ "Action") choice (
+   ("RemoveToMono" (_ "Remove Vocals: to mono"))
    ("Remove" (_ "Remove Vocals"))
    ("Isolate" (_ "Isolate Vocals"))
    ("IsolateInvert" (_ "Isolate Vocals and Invert"))
+   ("RemoveCenterToMono" (_ "Remove Center: to mono"))
    ("RemoveCenter" (_ "Remove Center"))
    ("IsolateCenter" (_ "Isolate Center"))
    ("IsolateCenterInvert" (_ "Isolate Center and Invert"))
@@ -33,11 +36,9 @@ $control action (_ "Action") choice (
 $control strength (_ "Strength") real "" 1.0 0.0 50.0
 $control low-transition (_ "Low Cut for Vocals (Hz)") real "" 120 1 24000
 $control high-transition (_ "High Cut for Vocals (Hz)") real "" 9000 1 24000
-
 ;;control rotation "Rotation (Degrees)" real "" 0 -180 180
 (setf rotation 0.0)
-
-
+; 
 ;; make aref shorter
 (defmacro  : (array index) (backquote (aref ,array ,index)))
 ;;
@@ -179,6 +180,7 @@ bar-x bar-y s-xy s-x2 s-y2 (sqrt s-x2) (sqrt s-y2) r r2 (* s-y2 (- 1 r2)) a0 a1)
           (power-dif (power-spectrum side fs 2))
           (wt-exp (s-exp   (scale strength    (diff power-dif power-sum)))) 
           (weight (shape wt-exp *map* 0))
+          ;(weight (shape (db-to-linear power-dif)  (s-exp  (mult 2 (s-log *map2*))) 1))
           (weight (snd-samples weight ny:all)))
      (do ((i low-transition (+ i 2))) ((>= i high-transition))
        (setf (: out i) (: weight (/ (1+ i) 2)))
@@ -192,7 +194,7 @@ bar-x bar-y s-xy s-x2 s-y2 (sqrt s-x2) (sqrt s-y2) r r2 (* s-y2 (- 1 r2)) a0 a1)
 ;; between the two speakers
 (defun transform  (snd &optional ( cosine (cos (abs rotation))) (sine (sin (abs rotation)))) 
   (let* ((direction (/  (+ 1e-15 rotation) (abs  (+ 1e-15 rotation))))
-         (fft-offset (s-rest (if (< action 6) (/ hop (get-duration *sr*)) 0)))
+         (fft-offset (s-rest (if (< action 7) (/ hop (get-duration *sr*)) 0)))
          (L (seq (cue fft-offset) (cue (: snd 0))))
          (R (seq (cue fft-offset) (cue (: snd 1)))))
          (vector (sum (mult cosine  L) (mult (- direction) sine R))
@@ -204,28 +206,34 @@ bar-x bar-y s-xy s-x2 s-y2 (sqrt s-x2) (sqrt s-y2) r r2 (* s-y2 (- 1 r2)) a0 a1)
   (if (soundp *track*) (return-from catalog  (_ "This plug-in works only with stereo tracks."))
       (setf snd (vector (snd-copy (: *track* 0)) (snd-copy (: *track* 1)))))
   (cond
-         ((= action 7)
+         ((= action 8)
           (return-from catalog (summary (least-squares-xy (: snd 0) (: snd 1) :show nil))))
-         ((= action 6) 
+         ((= action 0) 
+          (display "" low-transition high-transition); values are quantized to bins 
+          (return-from catalog 
+           (sum (: snd 0) (mult -1 (: snd 1)) 
+                (sum (lowpass8 (: snd 1) low-transition) 
+                     (highpass8 (diff (: snd 1) (lowpass8 (: snd 1) low-transition)) high-transition))))) 
+         ((= action 4) 
           (return-from catalog (diff (: snd 0) (: snd 1))))
          (t; For everything that involves center isolation
           (setf snd  (transform  snd))
           (setf analyze-win (s-sqrt (fft-window fs type hop zs)))
           (setf synthesis-win analyze-win)
-          (unless double-win (setf analyze-win (fft-window fs type hop zs))
+                        (unless double-win (setf analyze-win (fft-window fs type hop zs))
                              (setf synthesis-win nil))
           (setf *win-sigma* (* fs (peak (integrate analyze-win) ny:all)))
           (setf sum-fft (stft (sum (: snd 0) (: snd 1)) fs hop analyze-win))
           (setf dif-fft (stft (diff (: snd 0) (: snd 1)) fs hop analyze-win 'steer sum-fft))
           (setf c (snd-ifft 0 *sr* dif-fft hop  synthesis-win ))
           (cond 
-                ((member action '(0 3)) 
+                ((member action '(1 5)) 
                  (setf output (vector (extract-abs  (/ hop *sr*) original-len (diff (: snd 0) c)) 
                                        (extract-abs  (/ hop *sr*) original-len (diff (: snd 1)  c)))))
-                ((member action '(1 4)) 
+                ((member action '(2 6)) 
                  (setf strength (recip strength))
                  (setf output (extract-abs (/ hop *sr*) original-len c)))
-                ((member action '(2 5))
+                ((member action '(3 7))
                  (setf strength (recip strength))
                  (setf output (extract-abs  (/ hop *sr*) original-len (mult -1 c)))))))
           (if (soundp output) (setf output (vector output output)))
@@ -244,13 +252,21 @@ bar-x bar-y s-xy s-x2 s-y2 (sqrt s-x2) (sqrt s-y2) r r2 (* s-y2 (- 1 r2)) a0 a1)
 ;; Some input corrections
 (setf strength  (expt (limit strength 0.02 50.0) 2.0))
 ; bins to be ignored (bass and treble) 
-(if (> action 2) (psetq low-transition 0.0 high-transition 24000.0))
-(let* ((ltrans (logior (truncate (/ (* 2 fs (limit low-transition 1 (/ *sr* 2.0))) *sr*)) 1))
+(if (> action 3) (psetq low-transition 0.0 high-transition 24000.0))
+(let* ((ltrans (logior (truncate (/ (* 2 (1- fs) (limit low-transition 1 (/ *sr* 2.0))) *sr*)) 1))
        (htrans (logior  (limit (truncate (/ (* 2 fs  high-transition) *sr*)) 1 (1- fs)) 1)))
       (psetq low-transition (min ltrans htrans)
              high-transition (max ltrans htrans)))
+; back to real frequencies for the classic Vocal Remover
+; Note: Fqs are quantized as if FFT would be used 
+; ca. 2.6 Hz bin-distance @ 44.1 kHz
+(when (= action 0)
+      (setq bin-distance (/ *sr* 2.0 fs)) 
+      (psetq low-transition (* low-transition bin-distance)
+             high-transition (* high-transition bin-distance)))
+;
 (setf out (snd-samples (snd-const 0.0 0 fs fs) fs)); holds the left/right weights (removal)  
 (setf *map* (snd-pwl 0 10000 (list 0 0.5 10000 0.0 20000 -0.5 20001)))
 (setf *norm* 1.0)
 (expand 120); remove for lower efficiency/more conservative  memory management 
-(catalog)
+(catalog)
\ No newline at end of file
diff --git a/plug-ins/vocalremover.ny b/plug-ins/vocalremover.ny
deleted file mode 100644
index 00177df66..000000000
--- a/plug-ins/vocalremover.ny
+++ /dev/null
@@ -1,140 +0,0 @@
-$nyquist plug-in
-$version 4
-$type process
-$preview linear
-$name (_ "Vocal Remover")
-$manpage "Vocal_Remover"
-$action (_ "Removing center-panned audio...")
-$author (_ "Steve Daulton")
-$release 2.3.0
-$copyright (_ "Released under terms of the GNU General Public License version 2")
-
-;; This version of vocalremover.ny by Steve Daulton June 2013.
-;;
-;; based on Center pan Remover by David R. Sky November 12, 2004
-;; Modified by Gale Andrews January 2008 to make full spectrum removal 
-;; the default, restore a single Help screen and restore error checking.
-;; Thanks to David Hostetler for notes in his own vocal remover plug-in,
-;; http://www.freelists.org/archives/audacity4blind/06-2006/msg00049.html
-
-;; Released under terms of the GNU General Public License version 2:
-;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
-;;
-;; For information about writing and modifying Nyquist plug-ins:
-;; https://wiki.audacityteam.org/wiki/Nyquist_Plug-ins_Reference
-
-$control action (_ "Remove vocals or view Help") choice (
-   (_ "Remove Vocals")
-   (_ "View Help")
-) 0
-$control band-choice (_ "Removal choice") choice (
-   ("Simple" (_ "Simple (Entire Spectrum)"))
-   ("Remove" (_ "Remove Frequency Band"))
-   ("Retain" (_ "Retain Frequency Band"))
-) 0
-$control low-range (_ "Frequency band from (Hz)") float-text "" 500 0 nil
-$control high-range (_ "Frequency band to (Hz)") float-text "" 2000 0 nil
-
-
-(defun help ()
-  (let ((msg (format nil
-(_ "Vocal Remover requires a stereo track. It works best with
-lossless files like WAV or AIFF, rather than MP3 or
-other compressed formats. It only removes vocals or other
-audio that is panned to center (sounds equally loud in left
-and right). Vocals may be mixed this way. Inverting one
-channel then panning both to center cancels out any audio
-which was originally center-panned, making it inaudible.
-This can remove some parts of the audio you may want to
-keep, such as drums, which are also often mixed to center.
-If the vocals and other centered parts differ in pitch,
-this can be solved by removing only selected frequencies.~%
-Vocal Remover thus has three choices of removal method.
-'Simple' inverts the entire frequency spectrum of one
-channel. This may remove too much music if other parts of
-the audio are centered as well as the vocals. In that case,
-try the other choices. If the vocals are at a different
-pitch than the other audio (such as a high female voice),
-try 'Remove frequency band'. This only removes frequencies
-between a lower and upper limit which you can enter in the
-'Frequency band...' boxes. Experiment by entering what
-sounds like the most significant frequency range of the
-original vocals. If the other choices remove too much
-audio in a particular frequency range (such as low drums
-or bass), try 'Retain frequency band'. This only removes
-frequencies outside the limits, retaining the others."))))
-    (format t "~a" msg) ;print to debug (coppying supported on all platforms)
-    msg)) ;return message
-
-
-(defun check-stereo ()
-  (when (soundp *track*)
-    (throw 'err (format nil
-(_ "~%Vocal Remover requires an unsplit, stereo track.~%~
-If you have a stereo track split into left and right~%~
-channels, use 'Make Stereo Track' on the Track~%~
-Drop-Down Menu, then run Vocal Remover again.~%")))))
-
-(defmacro validate (Hz)
-;; Filters become unstable when very close to 0 Hz or
-;; to Nyquist frequency, so return NIL to disable.
-  `(if (or (< ,Hz 1)(> ,hz (- (/ *sound-srate* 2) 1)))
-       (setf ,Hz nil)))
-
-;;; Ensure frequency range is valid
-(defun check-range ()
-  ;; Ensure min < max
-  (when (< high-range low-range)
-    (let ((temp low-range))
-      (setf low-range high-range)
-      (setf high-range temp)))
-  (validate low-range)
-  (validate high-range))
-
-(defun bandpass (sig low high)
-  (cond
-    ((and low high) ;bandpass
-      (lowpass8
-        (highpass8 sig low)
-        high))
-    (low (highpass8 sig low))
-    (high (lowpass8 sig high))
-    (t sig)))
-
-(defun bandstop (sig low high)
-  (if (and low high (< (/ (- high low) low) 0.1))
-      (format t (_ "Warning:~%~
-              Selected band-stop filter is~%~
-              ~a Hz to ~a Hz.~%~
-              A very narrow stop-band filter may have~%~
-              unexpected results.~%~%")
-              low high))
-  (let ((low-sig (if low (lowpass8 sig low)(s-rest 1))))
-    (sum
-      low-sig
-      (if high (highpass8 (diff sig low-sig) high)(s-rest 1)))))
-
-(defun CentrePanRemove ()
-  (check-stereo)
-  (check-range)
-  (cond
-    ((= band-choice 1) ; remove frequencies inside range
-      (sum (aref *track* 0)
-           (mult -1 (aref *track* 1))
-           (bandstop (aref *track* 1) low-range high-range)))
-    ; Nothing to remove - skip effect.
-    ((and (= band-choice 2)(not low-range)(not high-range))
-      (format t (_ "Current settings returned the original audio."))
-      nil)
-    ((= band-choice 2) ; remove frequencies inside range
-          (sum (aref *track* 0)
-               (mult -1 (aref *track* 1))
-               (bandpass (aref *track* 1) low-range high-range)))
-    (t ; invert and add right to left channel
-      (sum (aref *track* 0)
-           (mult -1 (aref *track* 1))))))
-
-
-(if (= action 1)
-    (help)
-    (catch 'err (CentrePanRemove)))
diff --git a/src/effects/nyquist/LoadNyquist.cpp b/src/effects/nyquist/LoadNyquist.cpp
index 881c31369..96909a2ab 100644
--- a/src/effects/nyquist/LoadNyquist.cpp
+++ b/src/effects/nyquist/LoadNyquist.cpp
@@ -46,7 +46,6 @@ const static wxChar *kShippedEffects[] =
    wxT("StudioFadeOut.ny"),
    wxT("tremolo.ny"),
    wxT("vocalrediso.ny"),
-   wxT("vocalremover.ny"),
    wxT("vocoder.ny"),
 };
 
diff --git a/win/Projects/Audacity/Audacity.vcxproj b/win/Projects/Audacity/Audacity.vcxproj
index 443a383b8..545464844 100755
--- a/win/Projects/Audacity/Audacity.vcxproj
+++ b/win/Projects/Audacity/Audacity.vcxproj
@@ -940,7 +940,6 @@
     <copy Include="..\..\..\plug-ins\StudioFadeOut.ny" />
     <copy Include="..\..\..\plug-ins\tremolo.ny" />
     <copy Include="..\..\..\plug-ins\vocalrediso.ny" />
-    <copy Include="..\..\..\plug-ins\vocalremover.ny" />
     <copy Include="..\..\..\plug-ins\vocoder.ny" />
   </ItemGroup>
   <ItemGroup>
diff --git a/win/Projects/Audacity/Audacity.vcxproj.filters b/win/Projects/Audacity/Audacity.vcxproj.filters
index 1e9c63704..c9d60b5af 100755
--- a/win/Projects/Audacity/Audacity.vcxproj.filters
+++ b/win/Projects/Audacity/Audacity.vcxproj.filters
@@ -2644,9 +2644,6 @@
     <copy Include="..\..\..\plug-ins\tremolo.ny">
       <Filter>plug-ins</Filter>
     </copy>
-    <copy Include="..\..\..\plug-ins\vocalremover.ny">
-      <Filter>plug-ins</Filter>
-    </copy>
     <copy Include="..\..\..\plug-ins\vocoder.ny">
       <Filter>plug-ins</Filter>
     </copy>
@@ -2686,4 +2683,4 @@
       <Filter>Resources</Filter>
     </Manifest>
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file