וְהַמְשֹׁ֣רְרִ֔ים הֵימָ֥ן אָסָ֖ף וְאֵיתָ֑ן בִּמְצִלְתַּ֥יִם נְחֹ֖שֶׁת לְהַשְׁמִֽיעַ׃
Así Hemán, Asaph, y Ethán, que eran cantores, sonaban con címbalos de metal.
Rashi on I Chronicles
And the singers: Heman, Asaph, and Ethan, etc. To make a resounding voice, they were appointed over those musical instruments.