preferences: bind audio preferences to lrc

Refs #66840

Change-Id: I9176b20cc39642953e3a32a25e35a0b73d1ce8e2
diff --git a/AudioPrefsVC.h b/AudioPrefsVC.h
index 91bd824..024d955 100644
--- a/AudioPrefsVC.h
+++ b/AudioPrefsVC.h
@@ -32,7 +32,9 @@
 
 #import <Cocoa/Cocoa.h>
 
-@interface AudioPrefsVC : NSViewController
+@interface AudioPrefsVC : NSViewController <NSMenuDelegate, NSPathControlDelegate, NSOpenSavePanelDelegate> {
+
+}
 
 @end