How fast should your vibrato be?

Vibrato is one of the hallmarks of a great blues harmonica sound. This video doesn't teach you how to create vibrato; instead, it focuses on an important but neglected issue: how FAST your vibrato should be. With Adam Gussow of Modern Blues Harmonica. https://www.modernbluesharmonica.com/... Gussow is one of the subjects of "Satan & Adam," an award-winning documentary about a Harlem blues duo, currently screening on Netflix. https://www.netflix.com/title/81077539