Fingers and palm in up bow vs down bow

Rx: Achieve an even tone between up bow and down bow

A method of managing effort in the bow hand between the fingers and palm. This is meant to help deal with the natural imbalance in the bow and provide for an even tone on the upright bass.

From Michael Klinghoffer’s How to Drive a Double Bass series.

Includes an exercise called “the piano exercise” which focuses on balancing out the finger/palm forces to keep the sound even.

The “piano” part is a reference to a random piano thing he does at the beginning of the video so don’t get too hung up on that. The exercise is about making the tone even by balancing out the weight of the bow by manipulating it with your fingers and palm.