While not explicitly about the musical content of a worship service, Tony Morgan's post challenges us to consider the question.
Does anyone have any scripture to back this up? :D
David Wilcox's comment is as close as I've seen:
First is this: I don’t think excellence of any particular type is a specific command of the Bible.... I would also go so far to say that excellence is not explicitly commanded anywhere (however, I haven’t memorized the Bible, so I am open to adjustment here).However, the Bible does expect and call us to faithfulness. And there are at least a couple passages that define human faithfulness when it comes to evangelism and the gospel: in Colossians 4:4 Paul prays that he would make the gospel clear and in Matthew 10:27 Jesus commands his disciples shout the message from the housetops.
