How to Play the Chromatic Scale on Piano or Keyboard. Left hand. Correct fingering. Three fingers are used. Finger 1 (thumb), finger 2 (index finger) and finger 3 (middle finger). Starting on C, the fingering for the left hand is 1313 213 1313 21, ascending. To go down the scale, you simply reverse the order of numbers. The same fingers play the same keys. So descending, the fingering is 12 3131 312 3131. #pianoscales #chromaticscale #chromatic #pianoscale #scales #pianolesson #pianolessons #lea