Tremolo vs Vibrato: Can You Hear the Difference?
Hear a steady tone, then tremolo and vibrato at four cycles per second. Listen for changes in level and pitch.
Watch on YouTube.
What to listen for
The first example holds a steady 440 Hz tone. Tremolo changes its level. Vibrato varies the pitch between 428 and 452 Hz in this demonstration. Both effects run at four cycles per second.
Hear when tremolo becomes a buzz