tuning key

10 LETTERS · STARTS WITH T

tuning key is a valid 10-letter word worth 17 points in Scrabble and 20 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

T1U1N1I1N1G2K5E1Y4

1 + 1 + 1 + 1 + 1 + 2 + 0 + 5 + 1 + 4 =17 PTS

DOUBLE WORD → 34TRIPLE WORD → 51

MEANING

What does tuning key mean?