[Quetscher]

Hi Tom,

I just listened to that great recording of Mario Dueñas. To me it seems to be a diaphragm vibrato, it’s very steady, not too fast and not too slow, that’s what I use on “Summertime” (BTW thanks for your comment on that…).

The third type of vibrato that I mean is a vibrato that you produce by pushing in and releasing your stomach mechanically in the speed you want to. I guess you can practice this similarly to the jaw vibrato.