[Harp-L] Vibrato

[David Fairweather]

All my life I've used what you might call "throat vibrato".  One day I was
talking to Jason Ricci about Alan "Blind Owl" Wilson's perfectly timed
vibrato and Jason surprised me by opining that Wilson used "tongue"
vibrato, just tapping his tongue on or near the roof of his mouth. Who am I
to disagree with Jason but I'm still not sure he's right. Tongue vibrato
certainly is easier to time, but to my ears it's a less smooth sound
interrupting the airflow more. Or maybe I just haven't mastered it. But
what do you guys use?