Sirach 50:18

18 The singers also sang praises with their voices, with great variety of sounds was there made sweet melody.

Sirach 50:18 In-Context

16 Then shouted the sons of Aaron, and sounded the silver trumpets, and made a great noise to be heard, for a remembrance before the most High.
17 Then all the people together hasted, and fell down to the earth upon their faces to worship their Lord God Almighty, the most High.
18 The singers also sang praises with their voices, with great variety of sounds was there made sweet melody.
19 And the people besought the Lord, the most High, by prayer before him that is merciful, till the solemnity of the Lord was ended, and they had finished his service.
20 Then he went down, and lifted up his hands over the whole congregation of the children of Israel, to give the blessing of the Lord with his lips, and to rejoice in his name.

The Brenton translation of the Septuagint is in the public domain.