דברי הימים א כה:ז פירוש: רש״י

every expert - Heb. הַמֵּבִין. In regard to song, the expression is appropriate, for it is written: (below verse 8): “expert (מֵבִין) with pupil.” [Also] (15:22): “And Chenaniah, the leader of the Levites in song; he would chastise in song because he was an expert (מֵבִין).”