The N knob on my grand piano is out of use. Is this adjectives?

The N knob on my grand piano is out of use. Is this adjectives?

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yes if you enjoy a labtop
dont waste our time...oh and by the path the M key on My upright doesnt work either....!
i regard as its workin fine!



you used it 4 times in one sentence :P
adjectives is when it's working. uncommon is when it's not. :)
buy a different keyboard they are cheap