Richard Pratt notes that prophets have a huge role in I and II Chronicles. They are mentioned almost forty times. One way the Chronicler emphasizes the role of the prophet in Israel is by calling the Levites prophets. Here is what Pratt says:
The Chronicler highlighted the importance of prophecy by assigning a prophetic role to many Levites. On a number of occasions he designated Levites as “prophets” and “seers” (I Chr. 25:1-5, 2 Chr. 20:14, 24:20, 29:30, 35:15). This identification appears in Chronicles more clearly than any other portion of the Old Testament. It probably reflects the conviction that the Levites, especially the musical Levites, had a prophetic role in the post-exilic community.