I'm a musical person. I can't sing on key, I've forgotten how to play the only instrument I ever learned. I come from a family of people who sing and play like they breathe. The gene skipped me. But I am musical in the sense that I love music. I always have music on, somehow. And at work, when there is no music? I hear it in my head, in the rhythm of the people around me.
I belive that music is one of the purest, original forms of worship. It's transcendent, something so beyond just the physical bodies we use, the instruments we create. The angels themselves sing in worship of God, so why shouldn't we? I sing in the Mass, but softly, so as not to bother the poor people standing within earshot.
2 Samuel 6:5 - Meanwhile, David and all the house of Israel were celebrating before the Lord with all kinds of instruments made of fir wood, and with lyres, horns, tambourines, castanets, and cymbals.
2 Samuel 6:14-16: And David was dancing before the Lord with all his might, and David was wearing a linen ephod. So David and all the house of Israel were bringing up the ark of the Lord with shouting and the sound of the trumpet. Then it happened as the ark of the Lord came into the city of David that Michal the daughter of Saul looked out of the window and saw King David leaping and dancing before the Lord; and she despised him in her heart.
Why did Michal despise David for his exuberant, joyous worship of his Lord? She thought it was undignified, beneath him as King. But God, clearly, accepted this worship. The Psalms were meant to be sung, chanted. We've been praising God in music since the beginning, so why stop now? Music is a gift from God, both the ability to create it, and the appreciation of it.
Gregorian Chant - Salve Regina on YouTube. There's about a million others linked off of that one, and well, who doesn't love Gregorian Chants?
TransSiberian Orchestra's (and Metallica apparently) instrumental version of Carol of the Bells. Less traditional, more rocky, but I love the Carol of the Bells in all its forms!
Celtic Woman's more traditional version Carol of the Bells. There's an instrumental version out there done just with bells, but I can't find it on YouTube, and I'm still not home, with access to my personal collection.
Rufus Wainwright's Hallelujah - not a religious song, per se, but I love it anyway. It moves me.