Don Basilio

Don Basilio is not a large part, but he carries the opera's coldest idea. The music master arrives with a single piece of advice for Bartolo — discredit the rival not with truth but with rumour — and in one aria he turns gossip into a science. He is the comedy's small, smiling cynic, the one who knows exactly how a city talks.

"La calunnia è un venticello" is the role, and it is built as a single mechanism. It begins as a whisper, a little breeze barely moving — a tick of the clock under the orchestra — and it must stay there, patient, almost confidential. Then Rossini lets it grow: insinuation by insinuation, the line climbs and quickens until the breeze is a storm and the storm a cannon shot. The temptation is to push early. The whole effect depends on refusing to.

Vocally it sits low and wants the buffo virtues — clean Italian consonants, even runs, a crescendo measured rather than spent. The patter has to land every word while the orchestra swells against it. I treat the aria as a held breath: the slander is funny only because Basilio means it.