Here's some scripture for you.
Eph 2:10 Does the music promote good behavior?
Eph 4:29 Do the words edify or corrupt the mind.
Phil 4:8 Will this music promote good thinking?
Col 3:16 Does this music teach and encourage the believer?
I Thess 5:22 Does this music have an appearance of evil? (unclear message, no gospel)
I Tim 4:16 Do the musicians believe sound doctrine?
Titus 2:14 Are the musicians peculiarly Christian in their appearance and actions?
II Cor 6:3 Does this music offend strong, mature Christians? Does it confuse the unbeliever?
Phil 2:3 Does the music cause disunity or division in the church?
I Cor 14:7 Is the music distinctive or cause confusion to new Christians as they try to discern Godly music from worldly music?
Let me start by saying that I agree with much of what you say, Diamond Lady. Indeed in one way I would go even further, and say that "performances" of
any style of music (some people playing/singing, others listening) have no place in church worship.
However, I can't agree that all the scripture verses you mention, and your questions beside them, have anything to do with music.
About music promoting good behaviour: Yes, of course music affects behaviour. We have the example of David playing music to Saul. This one I agree with.
About words edifying the mind: That surely is nothing to do with music. Words can be edifying or unedifying, regardless of whether or not they have been set to music. And, let's face it, if the
words are unedifying, it doesn't matter what style of music we set them to, they will remain unedifying.
About music and good thinking: (same as for behaviour).
About music teaching and encouraging: Words can teach, but music by itself cannot. Music
can encourage, which probably explains why military bands, sea shanties, and work songs came into existence.
About music having the appearance of evil: The verse you mentioned seems, in some English translations, to be saying, "Abstain from everything which, though not evil itself, appears or seems to be evil." But it rather means, "Abstain from every form of evil." And again, it is not music as such which can be evil; it's words. I think of Carl Orff's
Carmina Burana, for example. The notes, the orchestration and the rhythmic patterns the composer uses are not evil, but the words are. They include "the freshness of medieval love lyrics, exuberance of the drinking song, the zest of the sinner's 'confessions', the wild humour of the hymns to gambling and gluttony, the stoic litany to Lady Luck ('Fortuna Imperatrix Mundi') which Orff chose to open and close his score. S*x is also a dominant theme in many of the songs." (from
this website)
About musicians believing sound doctrine: Surely
all Christians should believe sound doctrine. Even if you are talking about musicians who put on a
performance for others to listen to, the same thing applies.
About musicians being peculiarly Christian in their appearance and actions: Again, surely every Christian should be concerned with these things (though not to the extent that we forget that the Lord looks on the heart). As far as appearance is concerned, what is "peculiarly Christian"?
About music offending or confusing: Yes, music
can offend. But such offence is not limited to one style or genre of music. I would be offended if my church suddenly demanded that we start singing hymns to Gregorian chant, for instance. (That's not likely to happen, I assure you!

) Musical styles can also confuse, either by being complicated to sing, or because they are linked in the worshipper's mind with some particular type of song other than a hymn. There are, for instance, some hymn tunes based on melodies from Mozart's operas, and plenty of hymn tunes in the style of early 20th century popular music. Exclusive use of either of such styles of music could give wrong ideas about Christ and His glorious gospel.
About music causing disunity: The devil will use anything he can to bring about disunity in a church.
It is not limited to differences over musical preferences.
But I would stress that I do agree with much of what you say.