Transcribed below.

Sing to the Lord a new song,
and praise him with lyrics still in copyright.
Raise a song and bring hither the amps,
and plug in the PA system.
Let the guitars strum two chords;
yea, and let a third be added.
Let all the people mumble along;
let each pick a random key and stick with it regardless of the key his neighbor hath picked.
For behold, the Lord is gracious and merciful,
slow to anger, even when aesthetically provoked.
He will not cut off his people Israel,
even when their praises sound like open-mike night at the coffeehouse on Brookline Boulevard.