"Raspyness" vs "raspy-ness"

If I'm talking about someone's voice is raspyness or raspy-ness correct?

The raspyness of Cobain’s voice adds another layer of complexity to the song.

The raspy-ness of Cobain’s voice adds another layer of complexity to the song.

Spelling checker doesn't like raspyness, but raspy-ness doesn't look quite right.

Solution 1:

The proper term you're looking for is raspiness. Definitely not raspy-ness, neither raspyness, nor raspi-ness. The Wiktionary lists it, even with quotations backing it up:

The speaking voice was clear and strong with no raspiness, but there was a noticeable rasp in the loud singing voice.

~ 1978, Mavis Douglas, Vocal problems of the young singer