Chord
A chord was several musical notes played at the same time.

While on Earth prior to 2151, Doctor Phlox's study of religions led him to spend two weeks at a Tibetan monastery learning to sing chords with the high lamas. ()

In 2364, Sonny Clemonds asked if he could borrow a guitar. When Data told him that the computer could replicate one for him, he was less than optimistic about how long it would take, saying, " I was kind of hoping to get one while I still remember the chords." ()

In 2369, Jean-Luc Picard commented on Nella Daren's choice to play an F minor chord rather than a diminished D, saying it was (pleasantly) unexpected. ()

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Music