So there was this question that came in my mind. Maybe someone could explain it to me. Thing is, I've been wondering what would happen if a band would change his vocalist that sings in a different key than the previous one. For example : Jens Kidman (Meshuggah) sings in Bb. Let's say he would leave the band and they would get somebody who sings in E. What does this mean for their old songs with Jens? Cause if I'm correct, the singer indicates in which key a band plays, right? So if this would be a big change for the singer, does this mean they have the play the older songs in a different key or does stay the same?