Music writer John Kelman of All About Jazz interviews Tetra endorser

 Dr. Ron Carter. Dr. Ron is the world's most recorded Jazz bass  player (Guinness)

 and the list of the people he hasn't played with is likely (Wayne)

 Shorter than those he has played with.  Ron speaks animatedly about

 his Tetra 606s at 8:40.  Thank you Ron for being a friend and for that

 very special thing that you do.

Here is the youtube link:

https://youtu.be/knNx4ReJW0g