1. "Music" is not listed in either of the New Testament's lists of the ministry gifts which God has set in the church. Yet today in the church music takes primary place. I wonder whether we'd know what to do in a church service, or in an evangelistic outreach, without music.
2. Musicians could possibly be categorized as "helps", an office which is a long way down the list in importance after apostles, prophets, teachers, miracles and healings. Therefore musicians should facilitate not dominate the other more important manifestations of the Spirit during a meeting. If the song-leader also occupies one of the higher offices, then he or she may be able to express his or her higher gift through music. But if the song-leader is a person who does not hold a higher office in the Spirit, then his or her musicianship is a ministry of "helps" and would do best to take a role in the service that facilitates the other expressions of the Spirit during a meeting rather than featuring in its own right.
3. Very often a greater manifestation of the Spirit will begin to sweep a congregation when the music is suspended, or at least turned-down in volume and given a supportive rather than featuring role.
4. An appropriate time to strike the music up again could be afterwards - after the other manifestations and functions of the Spirit have taken their course - when it can be accompanied with dancing and celebration of the miracles which the congregation has just witnessed and experienced.
5. The "sacrifice of praise" which pleases God is not a work of the law, but rather a spontaneous response to grace - the "fruit of our lips..." ('fruit', contrasted with 'works') "...offering thanks to God."