the more vpoices
voices can
sing in the same height
when the klavier shows that
the height can be different
is the better\
the choir is the voice down
thesolists of orchestra down
plays as the solist of choir
the orchestra is down

weneed in the reahearsal -very difficult
to play solo
tho switch the players
voice can
appear in between tact line or inside
i donot know this