Adjective : a musical instrument. ,a musical entertainment.    From Dictionary.com. 

Yet such is the noise and sound of the word, that they are willing to become professors thereof; there is some kind of musicalness in it, especially when well handled and fingered by a skilful preacher.    From Wordnik.com.  [The Riches of Bunyan] Reference

Now, if ‘musicalness and unmusicalness’ had not been a property essentially inhering in man, these changes would have been.    From Wordnik.com.  [On the Generation and Corruption] Reference

It includes constructiveness in story, character-drawing, picturesqueness, musicalness, naturalness, -- in fine, whatever art may combine with poetry or the soul of poetry admit in art.    From Wordnik.com.  [The Atlantic Monthly, Volume 03, No. 20, June, 1859] Reference

And in definition also the accident is prior to the whole, e.g. ‘musical’ to ‘musical man’, for the definition cannot exist as a whole without the part; yet musicalness cannot exist unless there is some one who is musical.    From Wordnik.com.  [Metaphysics] Reference

Of things that are quanta incidentally, some are so called in the sense in which it was said that the musical and the white were quanta, viz. because that to which musicalness and whiteness belong is a quantum, and some are quanta in the way in which movement and time are so; for these also are called quanta of.    From Wordnik.com.  [Metaphysics] Reference

There is a thing in the air of our beautiful slopes which makes the people of a great instinctive musicalness and deceptiveness, with passions like those burning in the old mountain we have there.    From Wordnik.com.  [The Beautiful Lady] Reference

The farmer sat with his elbows on his knees, touching the tips of his fingers together in thoughtful fashion, and softly blowing the breath through his lips in a way that might have reached the dignity of a whistle if it had had a trifle more of musicalness.    From Wordnik.com.  [Say and Seal, Volume I] Reference

A coming-to-be of unmusicalness and a passing-away of musicalness: but in fact ‘musicalness and unmusicalness’ are a property of the persistent identity, viz. man.    From Wordnik.com.  [On the Generation and Corruption] Reference

I like music and musicalness.    From Wordnik.com.  [sheepdip Diary Entry] Reference