LARK holds one message at a time. Call the line and you will hear the
voice of whoever called before you — not a menu, not a greeting, just
the last thing someone left here.
You are then invited to record your own. If you commit it, it replaces
what you just heard, and becomes the only thing the next caller will
find on the line. Nothing accumulates on the relay. The line carries a
single voice forward, one caller at a time.
Every committed message is copied to a ledger and archived to an
Are.na channel with its duration, origin and hour of arrival. The
relay forgets; the ledger does not.
The line speaks these words, in this order.