The holy service demanded immense care and organization, particularly regarding the musical praise offered to God. Chenaniah, a leader of the Levites, held a key position in this sacred work, a role requiring unique expertise and authority.
The primary approach among commentators is that his responsibility centered on vocal music. Singing in this context is viewed as an act of lifting or carrying. This is either because it requires physically lifting the voice in song [מצודת דוד, מצודת ציון, רד"ק], or because the Levites were carrying words of praise, parables, and poetry to God [רלב"ג, מלבי"ם].
Regarding his practical duties, some commentators view him as the supreme leader of the singers [מצודת ציון, רד"ק, חומת אנך]. Others suggest his role was instructional and unifying, acting as the master choir conductor. In this capacity, he brought the singers together, determined exactly when they should start and stop, and guided them in hitting the correct melodies and knowing when to raise or lower their voices [רש"י, מלבי"ם]. It is even possible that Chenaniah did not sing at all, perhaps due to his age or voice, but functioned strictly as the musical commander and organizer [ביאור שטיינזלץ].
He was chosen for this high position because of his profound understanding. The majority of commentators explain that the holy songs were meant to be performed only by experts. Chenaniah possessed a deep mastery of musical wisdom, giving him the ability to decide exactly how a song should be properly executed [רש"י, מצודת דוד, רלב"ג, מלבי"ם]. However, another perspective suggests that his understanding went far beyond music. According to this view, he was also a prophet, and it was this spiritual greatness that ultimately established him as a leader [רד"ק, חומת אנך].