The Russian composer Rodion Shchedrin has long been damned faintly by two facts - that he is the husband of the Bolshoi prima ballerina Maya Plisetskaya and that he was for a long time the president of the Russian Composers' Union in the USSR. These two things were plenty enough to remove discussion of him from the musical arena to the seething forum of politics where every Soviet composer's actions were given intense non-musical scrutiny both inside and outside the USSR.

Over this weekend the spaces of London's Royal Opera House will be transformed by strange sounds, vaguely operatic, vaguely foresty, thoroughly chilled. The ambient atmospheres will be made by Scanner, who calls himself a “cultural engineer” and has made sounds for morgues, dances, Philips wake-up lights and chill-out rooms in clubs, during an extraordinarily eclectic career that seems to exist somewhere on the very edge of technology.

In general, I’m no particular fan of composers talking in public about their own music. My family suggests that this is because I’m hoping to get the job of talking about it myself. But the real reason is that, on the whole, composers don’t tell the truth about their work – and indeed why should they? Creative work is a mysterious and impenetrable process, and it’s a very modern, right-to-know sort of assumption that those who do it should also be able to explain it. Probably nobody is. But people naturally suppose that when the horse opens its mouth, the oracle will speak.

When I was asked 12 months ago by the BBC if I’d be interested in making a film on Henryk Górecki  (in Poland) and Arvo Pärt (in Estonia) for their Sacred Music series, I said yes, almost immediately. I’d been very impressed by the first series and liked the idea pairing of two composers writing religious music in the communist Eastern Bloc who have become almost cult figures in our secular age.

If music writers love to place artists in genres, it is a more-than-usually fruitless task with Magnetic Fields, the brainchild of “composer, multi-instrumentalist and bubblegum purist” Stephin Merritt. Many people discovered Magnetic Fields (named after the surrealist André Breton’s novel Les Champs Magnetiques) with their 3-CD box set 69 Songs, which was released in 1999. The titles themselves suggested some of his musical playgrounds, such as “Punk Love”, “Love is Like Jazz” or “World Love”. Others referred sometimes obliquely to Billie Holliday, Orchestral Manoeuvres in the Dark, Fleetwood Mac or Irving Berlin. Merritt said that the album “was not remotely an album about love. It’s an album about love songs, which are very far away from anything to do with love”.

Before Shutter Island - long, long before - there was The Cabinet of Dr Caligari. First released in 1920, Robert Wiene's hallucinogenic film descends, like that of Martin Scorsese who cites it as a major influence, into the creepy shadowlands between sanity and madness. This spring Caligari goes on national tour (details below) spruced up with a musical accompaniment by Minima, a four-strong rock group which specialises in supplying the sound for silents. The group consists of drums (Mick Frangou), bass (Andy Taylor), cello (Greg Hall) and guitar (Alex Hogg). Here, Hogg talks about Minima's work in a Q&A followed by a mini-masterclass on scoring a key scene from the movie.

Someone sharp as a whip thought hard about the price-fun balance of the latest Royal Ballet triple bill. An accountant, probably.  Deep inside the cloisters of the Royal Opera House, they said: “Now top price stalls are £97 each for Romeo and Juliet, that’s nearly £200 a pair. Interval wine at £6 a glass, £24. A programme, train fares from - say - Windsor at £15 each, plus taxis. That’s £260 for their evening. So for the triple, if we’re going to charge £37.50 top whack, we can hardly give them more than a third of the fun, can we?”