Audio feedback with beeps to indicate turn switching

In balance and outside ski pressure training, recognizing the precise timing of turn switching is key to improvement.

In early forward movement, brake ski speed in turn switching, then accelerate ski in the new side of turn has started.

in monitor mode, add click soud.

continuing new yawing side over 20ms, ring click sound. That is better than switching the yawing side in 1 frame.