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You follow the conductor in nimbus. This rings a bell which has the effect of sending out a global echo. The Conductor of the Choir is in vnum 17515. Use this only when you are overwhelmed helping new players, as it will typically pull all Angels off their player alts and come running to assist.
"the Conductor summons the angelic choir to sing, or some such"
It was starting to spam the imminfo channel so it was removed. To see it again:
infoset +debug , infoset +multi
Equal signs are reserved characters in Avatar and is used as command separator. You can however, still write it.
config +equal
I was told that this can cause some issues with the MUD. Crash? So it's not advised to leave this option on.
config -equal
will turn it off again.