It takes a moment to realize what was just referenced.

He firmly refuses to admit that he knows what was referenced, as well.

Noa scowls a little more overtly as he pours over the music sheets again, grumbling. "It doesn't make sense- we read this perfectly, a musical scale can't be that different between separate worlds! Ours were the same," he adds, huffing.

Granted, they also both come from relatively modern worlds...