"I am amazed to be still alive. Two hours of medieval torment.” Franco Zeffirelli - who has died at the age of 96 - had spent the day having a lumbar injection to treat a sciatic nerve. You could hear the bafflement in his heavily accented English.

Stockhausen stands alongside Monteverdi and Beethoven as a composer who exploded the understanding of his art. Stockhausen deeply changed the relationship between space, time and music; there’s a human, intimate dimension to his composition, and he predicted the future.

This is my third year as festival director of the London Handel Festival, an annual celebration of the life and work of composer George Frideric Handel, which takes place every spring in venues across the capital.

I’m here in Leeds at the end of five weeks of quite intense rehearsals for Opera North's new production of Mozart's The Magic Flute. Our director James Brining and his amazing team (including assistant director Deborah Cohen, set and costume designer Colin Richmond, and choreographer Tim Claydon) are putting it on the stage, and I’m ably assisted by George Jackson and Philip Voldman.

Outnumbered by four to one: out of the classical/opera team, Alexandra Coghlan, Jessica Duchen, David Benedict and Boyd Tonkin all chose English National Opera's production of

Five of Leoš Janáček's 10 operas are staples of the worldwide repertoire. Two I'd never seen on stage, so the slice I chose of the19-day festival devoted to all of them for the second time in the history of Brno, the cultured Moravian capital where he spent most of his life, tended to the rare and local.

Marx is having a terrible day. He is supposed to be finishing volume two of Capital but he’s distracted by his lust for the maid, workmen are taking away the furniture, his daughter thinks she’s caught a spy.... and what will his wife say when she discovers he’s taken her silver to the pawnbroker?  Where is Engels when Marx needs him most?

Before we hear a note, extras dressed as maintenance staff potter about the stage. They try to erase a scrawled slogan on a wall that reads “Hur allt började”: how it all began. “It” is the story of Wagner’s Ring cycle as presaged in the introductory drama of Das Rheingold, which kicks off the tetralogy. Prior, though, to the ominous, mesmeric swell of the E flat chord that anchors the Rheingold prelude, Stephen Langridge’s production for Gothenburg Opera shows us a busy, dogged human world of toil.

Why are great Wagnerian singers the most down-to-earth and collegial in the world of opera? Perhaps you have to be to master and sustain the biggest roles in the business, ones which can't be performed in isolation, and a strong constitution helps, too. Birgit Nilsson, the farmer's daughter born in rural Sweden 100 years ago, had all those qualities and many more.

Her special claim to fame was the most luminous pianissimo in the business, but that often went hand in velvet glove with fabulous breath control and a peerless sense of bel canto line. To know Maria de Montserrat Viviana Concepción Caballé i Folch, born in Barcelona 85 years ago, was clearly to love her. I never did (know her, that is), and I only saw her once, in a 1986 recital at the Edinburgh Festival. By then she was careful with her resources, but the subtly jewelled programme delivered on its own terms.