Google is little help for this search I'm afraid. I'm looking for articles and other resources that can help define and explain the role of the choir in Reformed Lord's Day worship.

I found some articles on the history of chorales and choirs in church history, some in which the choir played a liturgical role as a sort of "lower clergy" representing the priesthood, and Martin Luther's use of it to encourage congregational participation.

In Scripture I find examples of the Levitical choir actually leading in some of the battles of ancient Israel! Sounds intriguing, and I believe the choir (or at very least, the singing congregation) is a vital part of spiritual warfare.

"Worship as warfare" got quite distorted in the old Charismatic circles I used to run in. But I'm hoping to find a biblical basis - beyond allegorical interpretation - for having a choir in the assembly for Lord's day worship, and what role, if any, the choir should play biblically.

Can anyone point me to some research/resource material for this?

Thanks,
Robin