Niccolò Paganini was the most controversial classical musician who ever lived. Although widely acknowledged to be one of the most brilliant performers of his lifetime, he provoked wildly contradictory opinions amongst his contemporaries and was constantly denounced as a charlatan in league with the devil – a spell in gaol for a paternity suit gave rise to the myth that he had acquired his dazzling technique from a pact with the devil during his incarceration.

Twelfth-century abbess, healer and mystic Hildegard of Bingen had no formal musical training. Perhaps because of this her music – exquisite arabesques of chant melody, animated by the conviction of her religious beliefs – creates a language all its own, a “swaying bridge between heaven and earth”, as she characterised it.

Composer and music producer Nitin Sawhney (b 1964) is known for his variety of musical projects, reflecting his background fusing Indian and British heritage. He has written music for films, television, dance productions, studio albums and concert performance, and is increasingly developing the possibilities of video games.

We critics often find ourselves "embarrassed by historical facts", as Craig Raine once put it. Raine was trying to explain why so many people still value Wilfred Owen's poetry - to him, the most overrated corpus of the 20th century. "[Owen's] life and death as a soldier make literary criticism seem invalid and pedantic," he argued, before proceeding to a very validly pedantic demolition job. Music has its own Wilfred Owens. Viktor Ullmann is one. His reputation (which was showcased last night in a rare staging of his only opera, The Emperor of Atlantis, at the Arcola Theatre) seems to survive solely on the back of his death at Auschwitz. It's a good reason to honour his memory, but not a good reason - alone - to listen to his music.

This hugely entertaining first instalment of a three-part investigation into what makes pop songs tick took as its theme "The Ballad", perhaps the most bomb-proof of pop's traditional forms. Mind you, the programme's definition of a ballad was pretty loose. For instance, I would say Sting's "Every Breath You Take" is merely medium-paced rather than a ballad. I'd just file Culture Club's "Do You Really Want to Hurt Me" under "Pop Song".

Hot on the heels of the Pet Shop Boys’ foray into ballet for Sadler’s Wells next month, it’s revealed that Sir Paul McCartney has composed a ballet for New York City Ballet, a love story called Ocean’s Kingdom.

Scheduled to premiere on 22 September, the four-act ballet so far has 45 minutes of music, and a cast of around 40. The New York Times reports that the first act is having its first run-through next Thursday at the Lincoln Center, NYCB’s home stage.

McDonald's (the hamburger people) are rarely acknowledged for their contributions to the arts, but without them we may never have witnessed the meteoric rise of composer Eric Whitacre. When he was 14, he heard a casting call on the radio for a McDonald's TV ad, persuaded his mother to drive him into Reno, Nevada to join the throng of hopeful teenagers, and ended up making a brief appearance in the "McDonald’s Great Year" commercial.

Talking to Jude Kelly at the Royal Festival Hall last night, Stephen Sondheim gave a glimpse into his own theory of lyrical composition by contrasting Noël Coward (whom "I intensely dislike") and Cole Porter.

After Monday's report on the Royal Opera House’s new contract demands, a young composer alerted theartsdesk to an intriguing offer on the Covent Garden website - to "Create" a soundtrack for dance. This is a competition for new talent which will be judged by a team led by Deborah Bull, the ROH’s Creative Director: the winning entries to be shown at the ROH in November as part of the FIRSTS 2010 festival.

For a creator of any kind, keeping control over what happens to their original work is essential. Their creativity is their livelihood, and their reputation is built on it. They protect it fiercely from other people copying it, altering it, selling it - anything in fact which devalues the work and damages the creators’ earning capacity from it.