I have been told to keep the left wrist straight when doing chromatic scale and move only fingers.
the problem happen with the 6th string , I try to keep to wrist still and let the finger curve to reach the note, but I notice that with ring and pinky finger can reach but it has less space and can easily mute the 5th string ( I mean they doesnt curve nicely and I have to cup my wrist a little to have more strength and room for those fingers.
Another cup wrist occur when concern with barre chord such as barre on 7 fret and pinky on the 1st string 12th fret. and other 2 fingers have to work for melody part as well. I have to cup the wrist ( bring it forward ) to have more strength. I feel like I have to use the muscle at the back of the palm to help with the passage.
2018 hauser III
2018 Kathrin hauser
2017 Tobias berg
2017 paco marin 40th anni
2018 sakurai kohno maestro