- (IBAction)stop:(id)sender;
- (IBAction)faster:(id)sender;
- (IBAction)slower:(id)sender;
+- (IBAction)normalSpeed:(id)sender;
- (IBAction)prev:(id)sender;
- (IBAction)next:(id)sender;
- (IBAction)repeat:(id)sender;
- (IBAction)loop:(id)sender;
- (IBAction)repeatButtonAction:(id)sender;
+- (IBAction)quitAfterPlayback:(id)sender;
/* the three ugly helpers again */
- (void)repeatOne;