Culture

Disguises and mistaken identities are a staple of opera, but usually as part of the onstage, not the offstage, action. So what are we to make this week of a Handel opera that isn’t by Handel at all, and a Mozart opera that was largely composed in 1990? As usual in the opera house, there are good — if complicated — explanations. Every year the London Handel Festival tests the theory that forgotten operas are forgotten for a reason, rooting around the darkest corners of the composer’s output to find some abstruse treasures for their audience. This year they’ve outdone themselves, with a performance by Opera Settecento of Elpidia — an opera not heard since its initial run in 1725. The reason?

There’s an absolute zinger of a joke currently circulating around the London jazz scene. Miles Davis is being celebrated with a new biopic! And anything that spreads the message about jazz is undoubtedly a good thing. But – and now the punch-line – what a pity the film bogs itself down; all that sober analysis of Miles’s evolving concepts of harmony and musical structure diminishes what could otherwise have been a sure-fire commercial hit. In reality, Miles Ahead, directed by and starring Don Cheadle, is centred around a period in Miles Davis’s life between 1975 and 1979 when he was making precisely no music at all and instead spending his time binging on drugs, drink and recreational sex.

Ape Forgets Medication: Treyfs and Artknacks Londonewcastle Project (28 Redchurch Street, E2), until 23 April Process, means, method: it was these rather than the results which initially fascinated me. There was an unmistakable exhilaration in discovering that I was not merely learning a new language but that I was creating a language peculiar to myself. Given that it was non-verbal the word 'language' is inappropriate. In every instance the words, the capricious titles I have appended to the works (the treyfs and artknacks) came after. Treyf signifies that which is not kosher. Artknack is a neoligism which suggests arts, a knack or facility, a knicknack or cheap bling, arnaque (French for a scam).

The musical biopic is a staple of the Hollywood economy. Like an Airfix model kit it comes with the necessary parts presupplied: sex, drugs and a soundtrack. All the director need do is glue them together. Actors are keen too, as portraying musicians is like prospecting for Oscars: in recent years the lives of Edith Piaf, Ray Charles and Johnny Cash’s wife June Carter have all won statuettes for their stars. The life of Miles Davis, with its giant musical peaks and deep personal troughs, is tailor-made for the big screen. But for years he couldn’t be captured in a bottle. It hasn’t been for want of trying on the part of Don Cheadle, who stars in, directed, produced and took a co-writing credit on Miles Ahead.

A few weeks ago, I looked out on the Cathedral of Monreale from the platform on which once stood the throne of William II, King of Sicily. From there nearly two acres of richly coloured mosaics were visible, glittering with gold. In the apse behind was the majestic figure of Christ Pantocrator — that is, almighty. The walls of the aisles and nave were lined with scenes from the Bible. In another panel, just above, Christ himself crowned King William. It was a prospect of the greatest opulence and sophistication stretching in every direction from this regal vantage point. The mosaics are in the manner of Byzantium, and probably executed by Greek artists, but the architectural plan and inlaid floors are derived from medieval Italy.

Sunset Boulevard Coliseum, in rep until 7 May Sunset Boulevard is a tale of fractured glory with Homeric dimensions. The movie presents Hollywood as a never-ending Trojan War that attracts fresh generations of dreamy youths in search of conquest and treasure. The lead characters have retired from battle, wounded. Joe Gillis, like Odysseus, is a vagrant warrior ensnared in the island-mansion of Norma Desmond, who plays the role of broken-queen-turned-sorceress. These fabulous elements are preserved in Andrew Lloyd Webber’s musical version. So is the Norma-Joe affair with its distasteful emotional template: mother-son, boss-slave, mistress-poodle, crone-toyboy. The lovers are linked by nothing but neediness and failure, and each desires the mirage that the other represents.

Faith, has it really been two score years and ten? It has you know. Well, would you credit that? I know. Fifty years! Seems appropriate, though. What? That he'd leave this day. For sure. I mean, of all the days to pick! This one would be among the best. Possibly the very best. You're not wrong there. I might even be right. Woah, hold your horses! Even the little ones? Especially them. Brutish little creatures. Brutes, yes. Be that as it may - and mark my words, it may (even in April) - today marks the fiftieth anniversary of the death of Flann O'Brien, the second-greatest* Irish writer of the twentieth century. There should, by rights, be scarcely a dry eye in The Palace bar today. This includes the glass ones.

Oculus Rift. It sounds like something from a science fiction novel, and in many ways it is. Its release this week is the first stirring of a future stuffed with virtual reality headsets. The hope of its Californian engineers and their bitcoin backers is that we, the consumers, will soon use them to spend a whole lot of time outside of our lives. Strap the goggles to your face, position the headphones over your ears, press the on button, and — bzzzztp — you’re in a different world. The question is, who will create these worlds? The first prototype of the Oculus Rift was built five years ago by an 18-year-old called Palmer Luckey, and he had an 18-year-old’s use for it: video games.