Amplitude and Frequency Vibrato

• Amplitude vibrato is amplitude modulation (AM) in which the loudness fluctuates with a frequency of 1 to 10Hz.
• Frequency vibrato is frequency modulation (FM) in which the pitch fluctuates with a frequency of 1 to 10Hz. 

This applet requires Java 1.1 and a sound card.  The highest frequency that can be produced without aliasing problems is ~3500Hz.   This demonstration was created by Dan Boye.