diff --git a/plug-ins/SpectralEditParametricEQ.ny b/plug-ins/SpectralEditParametricEQ.ny
index 6c0f6ef87..b4219eeb9 100644
--- a/plug-ins/SpectralEditParametricEQ.ny
+++ b/plug-ins/SpectralEditParametricEQ.ny
@@ -1,7 +1,7 @@
 ;nyquist plug-in
 ;version 4
 ;type process
-;preview enabled
+;preview linear
 ;name "Spectral edit parametric EQ..."
 ;action "Filtering..."
 ;author "Paul Licameli"
diff --git a/plug-ins/SpectralEditShelves.ny b/plug-ins/SpectralEditShelves.ny
index ff89cc39f..f0b7188d1 100644
--- a/plug-ins/SpectralEditShelves.ny
+++ b/plug-ins/SpectralEditShelves.ny
@@ -1,7 +1,7 @@
 ;nyquist plug-in
 ;version 4
 ;type process
-;preview enabled
+;preview linear
 ;name "Spectral edit shelves..."
 ;action "Filtering..."
 ;author "Paul Licameli"
diff --git a/plug-ins/adjustable-fade.ny b/plug-ins/adjustable-fade.ny
index 9dd1d4c5e..19dc4d6a8 100644
--- a/plug-ins/adjustable-fade.ny
+++ b/plug-ins/adjustable-fade.ny
@@ -25,7 +25,8 @@
 
 
 (defun get-input (sig)
-"When previewing, we only need to process preview length."
+"Preview takes the entire selection so that we know the correct
+selection length, but preview only needs to process preview length."
   (if (get '*track* 'view)  ;NIL if preview
       sig
       (multichan-expand #'trim-input sig)))
diff --git a/plug-ins/crossfadetracks.ny b/plug-ins/crossfadetracks.ny
index bdb627c88..001aae89f 100644
--- a/plug-ins/crossfadetracks.ny
+++ b/plug-ins/crossfadetracks.ny
@@ -3,7 +3,7 @@
 ;type process
 ;name "Crossfade Tracks..."
 ;action "Crossfading..."
-;preview disabled - cannot use preview because tracks are processed differently.
+;preview selection
 ;author "Steve Daulton"
 ;copyright "Released under terms of the GNU General Public License version 2"
 
diff --git a/plug-ins/delay.ny b/plug-ins/delay.ny
index 4c9dd3b88..2a092c470 100644
--- a/plug-ins/delay.ny
+++ b/plug-ins/delay.ny
@@ -1,7 +1,7 @@
 ;nyquist plug-in
 ;version 3
 ;type process
-;preview enabled
+;preview linear
 ;categories "http://lv2plug.in/ns/lv2core#DelayPlugin"
 ;name "Delay..."
 ;action "Applying Delay Effect..."
diff --git a/plug-ins/notch.ny b/plug-ins/notch.ny
index 3a6248030..7e6a97c91 100644
--- a/plug-ins/notch.ny
+++ b/plug-ins/notch.ny
@@ -1,7 +1,7 @@
 ;nyquist plug-in
 ;version 1
 ;type process
-;preview enabled
+;preview linear
 ;categories "http://lv2plug.in/ns/lv2core/#FilterPlugin"
 ;name "Notch Filter..."
 ;action "Performing Notch Filter..."
diff --git a/plug-ins/tremolo.ny b/plug-ins/tremolo.ny
index 6552b7c87..596dfc51c 100644
--- a/plug-ins/tremolo.ny
+++ b/plug-ins/tremolo.ny
@@ -1,7 +1,7 @@
 ;nyquist plug-in
 ;version 3
 ;type process
-;preview enabled
+;preview linear
 ;categories "http://lv2plug.in/ns/lv2core#ModulatorPlugin"
 ;name "Tremolo..."
 ;action "Applying Tremolo..."
diff --git a/plug-ins/vocalremover.ny b/plug-ins/vocalremover.ny
index 4321ae618..a304e6bab 100644
--- a/plug-ins/vocalremover.ny
+++ b/plug-ins/vocalremover.ny
@@ -1,7 +1,7 @@
 ;nyquist plug-in
 ;version 3
 ;type process
-;preview enabled
+;preview linear
 ;categories "http://lv2plug.in/ns/lv2core#UtilityPlugin"
 ;name "Vocal Remover..."
 ;action "Removing center-panned audio..."