דברי הימים א, פרק ט״ז, פסוק ה׳

The musical arrangement of the Levites appointed to play before the Ark of the Covenant was highly organized, featuring a clear hierarchy and a specific division of roles. At the head of this musical ensemble stands Asaph. Zechariah serves directly under him as his deputy, holding the second highest position of importance [מצודת דוד, ביאור שטיינזלץ].

The rest of the named Levites are tasked with accompanying the vocal singing by playing various stringed instruments [ביאור שטיינזלץ]. In contrast, Asaph's specific musical role is distinctly highlighted. As the leader, he plays the cymbals, striking them together to produce a loud and powerful sound [מצודת דוד].