1 Timothy 2:11-12 - Let the woman learn in silence with all subjection. But I suffer not a woman to teach, nor to usurp authority over the man, but to be in silence.
1 Corinthians 14:34-35 - Let your women keep silence in the churches: for it is not permitted unto them to speak; but [they are commanded] to be under obedience, as also saith the law.
So you have women in the choir? How do they sing if they are silent?