From an essay linked by celticdragonfly:

"You know, the psalm is very forgiving. It doesn’t say, make beautiful music. It says, make a joyful noise–a joyful noise!–unto the Lord. The Lord is not your second-grade music teacher. The Lord doesn’t care if you sing off key. All God’s critters got a place in the choir. Make a joyful noise."

When I was a kid, I voraciously read and re-read the Ramona books, by Beverly Cleary. In one of them, Ramona comes home from Sunday school after a lesson on the "joyful noise" psalm, and has decided that pre-canned joyful noises just aren't enough for her. So she invents her own--and goes around for the rest of the day intermittently exclaiming, "yeep!"

Ramona's still my kind of gal. Yeep! to you and yours.