A Levi preparing to sing

Scene 1 of 6 · The Fifteen Steps
The instruments
Under the Court of Israel are chambers where the Levites keep their lyres, harps and cymbals. You collect your lyre.
Scene 2 of 6 · The Court of the Priests
Twelve at least
Never fewer than twelve Levites stand on the platform; there is no upper limit. Levite boys stand below to sweeten the sound with their voices.
Scene 3 of 6
Today's psalm
Each day has its psalm. Today, the third day, it is Psalm 82: 'God standeth in the congregation of God'.
Scene 4 of 6 · The Great Altar
The signal
As the wine is poured, the deputy waves the flags, the cymbal sounds, and you begin.
Scene 5 of 6 · The Azarah (inner courtyard)
Pause and bow
At each pause the trumpets blow and the whole people in the court bows down.
Scene 6 of 6
What we do not know
The words of the psalms are known. How they were sung is not. The site's Temple Sound page is a contemporary interpretation and says so.
Narrative detail, not a sourced claim.