diff --git a/Base.lproj/MainMenu.xib b/Base.lproj/MainMenu.xib
index 5c85b0739..5178a7197 100644
--- a/Base.lproj/MainMenu.xib
+++ b/Base.lproj/MainMenu.xib
@@ -990,6 +990,9 @@
                             <rect key="frame" x="0.0" y="14" width="64" height="26"/>
                             <autoresizingMask key="autoresizingMask"/>
                         </customView>
+                        <connections>
+                            <outlet property="playbackController" destination="705" id="FPc-ek-NRd"/>
+                        </connections>
                     </toolbarItem>
                 </allowedToolbarItems>
                 <defaultToolbarItems>
@@ -1246,6 +1249,9 @@
                             <rect key="frame" x="0.0" y="14" width="64" height="26"/>
                             <autoresizingMask key="autoresizingMask"/>
                         </customView>
+                        <connections>
+                            <outlet property="playbackController" destination="705" id="GWc-77-WHY"/>
+                        </connections>
                     </toolbarItem>
                 </allowedToolbarItems>
                 <defaultToolbarItems>
diff --git a/Preferences/Preferences/Base.lproj/Preferences.xib b/Preferences/Preferences/Base.lproj/Preferences.xib
index 9327cf173..56aecb566 100644
--- a/Preferences/Preferences/Base.lproj/Preferences.xib
+++ b/Preferences/Preferences/Base.lproj/Preferences.xib
@@ -382,7 +382,7 @@
                     <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
                     <clipView key="contentView" id="gUE-Yu-LLA">
                         <rect key="frame" x="1" y="1" width="488" height="113"/>
-                        <autoresizingMask key="autoresizingMask"/>
+                        <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                         <subviews>
                             <tableView verticalHuggingPriority="750" allowsExpansionToolTips="YES" columnAutoresizingStyle="lastColumnOnly" multipleSelection="NO" autosaveColumns="NO" rowHeight="24" rowSizeStyle="automatic" headerView="9rQ-Rq-K6J" viewBased="YES" id="gHG-xw-OyR">
                                 <rect key="frame" x="0.0" y="0.0" width="488" height="85"/>
@@ -404,7 +404,7 @@
                                         <tableColumnResizingMask key="resizingMask" resizeWithTable="YES" userResizable="YES"/>
                                         <prototypeCellViews>
                                             <tableCellView id="EEt-uJ-j6o">
-                                                <rect key="frame" x="18" y="0.0" width="386" height="24"/>
+                                                <rect key="frame" x="8" y="0.0" width="386" height="24"/>
                                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                 <subviews>
                                                     <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="7l9-R2-FVF">
@@ -439,7 +439,7 @@
                                         <tableColumnResizingMask key="resizingMask" resizeWithTable="YES" userResizable="YES"/>
                                         <prototypeCellViews>
                                             <tableCellView id="EDi-gi-Vg9">
-                                                <rect key="frame" x="421" y="0.0" width="38" height="24"/>
+                                                <rect key="frame" x="411" y="0.0" width="38" height="24"/>
                                                 <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
                                                 <subviews>
                                                     <textField horizontalHuggingPriority="251" verticalHuggingPriority="750" horizontalCompressionResistancePriority="250" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="0TJ-dK-Rfk">
@@ -557,19 +557,19 @@
                 <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="4xb-C2-wmz">
                     <rect key="frame" x="40" y="78" width="470" height="18"/>
                     <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
-                    <buttonCell key="cell" type="check" title="Spectrum 2D view" bezelStyle="regularSquare" imagePosition="left" state="on" inset="2" id="gXL-j6-df0">
+                    <buttonCell key="cell" type="check" title="Use flat perspective in toolbar" bezelStyle="regularSquare" imagePosition="left" state="on" inset="2" id="gXL-j6-df0">
                         <behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
                         <font key="font" metaFont="system"/>
                     </buttonCell>
                     <connections>
-                        <binding destination="52" name="enabled" keyPath="values.spectrumSceneKit" id="frQ-l7-tCE"/>
                         <binding destination="52" name="value" keyPath="values.spectrumProjectionMode" id="UGh-1j-iFC"/>
+                        <binding destination="52" name="enabled" keyPath="values.spectrumSceneKit" id="frQ-l7-tCE"/>
                     </connections>
                 </button>
                 <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="t6C-Va-hmO" userLabel="Use SceneKit">
-                    <rect key="frame" x="18" y="104" width="108" height="18"/>
+                    <rect key="frame" x="18" y="104" width="492" height="18"/>
                     <autoresizingMask key="autoresizingMask" widthSizable="YES" flexibleMinY="YES"/>
-                    <buttonCell key="cell" type="check" title="Use SceneKit" bezelStyle="regularSquare" imagePosition="left" state="on" inset="2" id="NMg-TO-amV">
+                    <buttonCell key="cell" type="check" title="Use 3D rendered spectrum" bezelStyle="regularSquare" imagePosition="left" state="on" inset="2" id="NMg-TO-amV">
                         <behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
                         <font key="font" metaFont="system"/>
                     </buttonCell>
diff --git a/Preferences/Preferences/en.lproj/Preferences.strings b/Preferences/Preferences/en.lproj/Preferences.strings
index dd1dff5d8..80667f783 100644
--- a/Preferences/Preferences/en.lproj/Preferences.strings
+++ b/Preferences/Preferences/en.lproj/Preferences.strings
@@ -198,7 +198,7 @@
 "ds2-aw-ebU.title" = "Limit volume control to 100%";
 
 /* Class = "NSButtonCell"; title = "Spectrum 2D view"; ObjectID = "gXL-j6-df0"; */
-"gXL-j6-df0.title" = "Spectrum 2D view";
+"gXL-j6-df0.title" = "Use flat perspective in toolbar";
 
 /* Class = "NSTextFieldCell"; title = "hh:mm:ss.ms"; ObjectID = "klv-Wh-0ur"; */
 "klv-Wh-0ur.title" = "hh:mm:ss.ms";
@@ -226,3 +226,7 @@
 
 /* Class = "NSButtonCell"; title = "Send crash reports and usage data"; ObjectID = "zQ2-6O-3Og"; */
 "zQ2-6O-3Og.title" = "Send crash reports and usage data";
+
+/* Class = "NSButtonCell"; title = "Use 3D rendered spectrum"; ObjectID = "NMg-TO-amV"; */
+"NMg-TO-amV.title" = "Use 3D rendered spectrum";
+
diff --git a/Preferences/Preferences/es.lproj/Preferences.strings b/Preferences/Preferences/es.lproj/Preferences.strings
index 905a34b5e..9fb9cbd13 100644
--- a/Preferences/Preferences/es.lproj/Preferences.strings
+++ b/Preferences/Preferences/es.lproj/Preferences.strings
@@ -109,9 +109,6 @@
 /* Class = "NSButtonCell"; title = "Colorful dock icons"; ObjectID = "GdX-5e-NeU"; */
 "GdX-5e-NeU.title" = "Colorear icono del dock";
 
-/* Class = "NSButtonCell"; title = "Spectrum 2D view"; ObjectID = "gXL-j6-df0"; */
-"gXL-j6-df0.title" = "Analizador en 2D";
-
 /* Class = "NSMenu"; title = "OtherViews"; ObjectID = "HKM-FW-dhH"; */
 "HKM-FW-dhH.title" = "Otras vistas";
 
@@ -240,3 +237,10 @@
 
 /* Class = "NSTextFieldCell"; title = "hh:mm:ss.ms"; ObjectID = "zaI-0m-tQf"; */
 "zaI-0m-tQf.title" = "hh:mm:ss.ms";
+
+/* Class = "NSButtonCell"; title = "Spectrum 2D view"; ObjectID = "gXL-j6-df0"; */
+"gXL-j6-df0.title" = "Use flat perspective in toolbar";
+
+/* Class = "NSButtonCell"; title = "Use 3D rendered spectrum"; ObjectID = "NMg-TO-amV"; */
+"NMg-TO-amV.title" = "Use 3D rendered spectrum";
+
diff --git a/SpectrumWindowController.m b/SpectrumWindowController.m
index 4c426ebed..977db92ed 100644
--- a/SpectrumWindowController.m
+++ b/SpectrumWindowController.m
@@ -10,6 +10,8 @@
 #import "SpectrumViewSK.h"
 #import "SpectrumViewCG.h"
 
+static void *kSpectrumWindowContext = &kSpectrumWindowContext;
+
 @interface SpectrumWindowController ()
 @property SpectrumViewSK *spectrumViewSK;
 @property SpectrumViewCG *spectrumViewCG;
@@ -18,7 +20,11 @@
 @implementation SpectrumWindowController
 
 - (id)init {
-	return [super initWithWindowNibName:@"SpectrumWindow"];
+	self = [super initWithWindowNibName:@"SpectrumWindow"];
+	if(self) {
+		[[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:@"values.spectrumSceneKit" options:0 context:kSpectrumWindowContext];
+	}
+	return self;
 }
 
 - (void)windowDidLoad {
@@ -27,6 +33,25 @@
 	[self startRunning];
 }
 
+- (void)dealloc {
+	[[NSUserDefaultsController sharedUserDefaultsController] removeObserver:self forKeyPath:@"values.spectrumSceneKit" context:kSpectrumWindowContext];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+					  ofObject:(id)object
+						change:(NSDictionary<NSKeyValueChangeKey, id> *)change
+					   context:(void *)context {
+	if(context == kSpectrumWindowContext) {
+		if([keyPath isEqualToString:@"values.spectrumSceneKit"]) {
+			self.spectrumViewSK = nil;
+			self.spectrumViewCG = nil;
+			[self startRunning];
+		}
+	} else {
+		[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
+	}
+}
+
 - (void)startRunning {
 	if(!self.spectrumViewSK && !self.spectrumViewCG) {
 		NSRect frame = [[self window] frame];
diff --git a/Visualization/SpectrumItem.h b/Visualization/SpectrumItem.h
index 7fd4892f8..56d16e31c 100644
--- a/Visualization/SpectrumItem.h
+++ b/Visualization/SpectrumItem.h
@@ -7,10 +7,13 @@
 
 #import <Cocoa/Cocoa.h>
 
+#import "PlaybackController.h"
+
 NS_ASSUME_NONNULL_BEGIN
 
-@interface SpectrumItem : NSToolbarItem
-
+@interface SpectrumItem : NSToolbarItem {
+	IBOutlet PlaybackController *playbackController;
+}
 @end
 
 NS_ASSUME_NONNULL_END
diff --git a/Visualization/SpectrumItem.m b/Visualization/SpectrumItem.m
index 4d90a0258..a0a537867 100644
--- a/Visualization/SpectrumItem.m
+++ b/Visualization/SpectrumItem.m
@@ -12,14 +12,60 @@
 
 #import "Logging.h"
 
+static void *kSpectrumItemContext = &kSpectrumItemContext;
+
+@interface SpectrumItem ()
+@property SpectrumViewSK *spectrumViewSK;
+@property SpectrumViewCG *spectrumViewCG;
+@end
+
 @implementation SpectrumItem
 
 - (void)awakeFromNib {
-	NSRect frame = NSMakeRect(0, 0, 64, 26);
-	NSView *view = nil;
-	if(self.toolbar) view = [SpectrumViewSK createGuardWithFrame:frame];
-	if(!view) view = [[SpectrumViewCG alloc] initWithFrame:frame];
-	[self setView:view];
+	[self startRunning];
+
+	[[NSUserDefaultsController sharedUserDefaultsController] addObserver:self forKeyPath:@"values.spectrumSceneKit" options:0 context:kSpectrumItemContext];
+}
+
+- (void)startRunning {
+	if(!self.spectrumViewSK && !self.spectrumViewCG) {
+		NSRect frame = NSMakeRect(0, 0, 64, 26);
+		self.spectrumViewSK = [SpectrumViewSK createGuardWithFrame:frame];
+		if(self.spectrumViewSK) {
+			[self setView:self.spectrumViewSK];
+		} else {
+			self.spectrumViewCG = [[SpectrumViewCG alloc] initWithFrame:frame];
+			if(self.spectrumViewCG) {
+				[self setView:self.spectrumViewCG];
+			}
+		}
+	}
+
+	if(playbackController.playbackStatus == CogStatusPlaying) {
+		if(self.spectrumViewSK)
+			[self.spectrumViewSK startPlayback];
+		else if(self.spectrumViewCG)
+			[self.spectrumViewCG startPlayback];
+	}
+}
+
+- (void)dealloc {
+	[[NSUserDefaultsController sharedUserDefaultsController] removeObserver:self forKeyPath:@"values.spectrumSceneKit" context:kSpectrumItemContext];
+}
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+					  ofObject:(id)object
+						change:(NSDictionary<NSKeyValueChangeKey, id> *)change
+					   context:(void *)context {
+	if(context == kSpectrumItemContext) {
+		if([keyPath isEqualToString:@"values.spectrumSceneKit"]) {
+			self.spectrumViewSK = nil;
+			self.spectrumViewCG = nil;
+			[self startRunning];
+		}
+	} else {
+		[super observeValueForKeyPath:keyPath ofObject:object change:change context:context];
+	}
 }
 
 @end