program selector 
						Button for selecting one of the instrument’s settings (voice edit buttons, sequencer control, etc.).
				  	
 
					
						modulation wheel 
						Wheel used to adjust the quality, or timbre, of a sound, separate from its pitch or volume.
				  	
 
					
						fast data entry control 
						Cursor used to rapidly set a parameter.
				  	
 
					
						fine data entry control 
						Rotating device that fine-tunes a parameter.