Yes, VOICINGS is a Scrabble word!

Letter values in Scrabble US: V 4, O 1, I 1, C 3, I 1, N 1, G 2, S 1.

Is it a valid word?

VOICINGS is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).

the act of adjusting an organ pipe (or wind instrument) so that it conforms to the standards of tone and pitch and color