46 For long ago, in the days of David and Asaph, there had been directors for the musicians and for the songs of praise and thanksgiving to God.

Read Nehemiah 12:46 Using Other Translations

For in the days of David and Asaph of old there were chief of the singers, and songs of praise and thanksgiving unto God.
For long ago in the days of David and Asaph there were directors of the singers, and there were songs of praise and thanksgiving to God.
The custom of having choir directors to lead the choirs in hymns of praise and thanksgiving to God began long ago in the days of David and Asaph.