Period instruments demand absolute honesty from their players. Their sound is their personality - candid, quirky, eccentrically beautiful - but their soul is revealed in the spirit of the playing, where beauty is not skin deep and the expressiveness of phrasing in the strings is created in the bow arm and from a truthfulness of intonation that does not hide behind vibrato.

Speaking about the Requiem he composed in 1990 in memory of the London Sinfonietta’s long-time artistic director Michael Vyner, Hans Werner Henze always talked as a believing atheist. “Paradise is here or ought to be,” he insisted, “not later, when nothing else happens;” and “In this world there is no hereafter, only presence: you can meet angels and devils in the street at any time.”

Xavier Montsalvatge: Orchestral works BBC Philharmonic/Juanjo Mena (Chandos)

It’s a sadness to all lovers of the French horn that Mozart’s four horn concertos, the product of his longest friendship, make their appearance all too rarely in the concert hall. Though the building blocks of the repertoire, perhaps their apparent frivolity counts against them. But last night the Orchestra of the Age of Enlightenment and its principal horn Roger Montgomery brought out of mothballs the best-known concerto, K495, and planted it in the middle of a programme celebrating Mozart the entertainer.

Stanislaw Skrowaczewski. That's quite a mouthful. Bruckner's symphonies can be too. But this is one of the reasons why Skrowaczewski has acquired quite a cult following for his Bruckner performances; it's why I once drove all the way to Zurich to hear him conduct one. His Bruckner is never offered as an indigestible slab of meat. It's never hard or chewy.

“Don Giovanni – Coming Soon” winked and nudged the publicity posters for English National Opera’s latest production. And just in case the entendre wasn’t clear they added a picture of a condom. Playful, provocative and just a little bit sordid, it captured the spirit of Mozart’s damaged seducer with singular accuracy. Too bad the revival of Rufus Norris’s 2012 production, though much changed since we last saw it, is still about as enticing as a second-hand sex toy.

For some reason, the Welsh have revived their Così fan tutte, from last year, with positively unseemly haste – if not quite so unseemly as the haste with which their La Bohème, from this spring, was wheeled back on last month barely three months after its first airing. It looks as if the outgoing intendant John Fisher, never notable for lively repertory planning, was either clearing his desk, or had simply scarpered.

It's been eight years since San Francisco Ballet were last here, charming us with their finesse and their smiles - welcome back. They offer a boost of spirit to the gloomsters of ballet over here. This small city which punches many times above its weight in the cultural world owes a vast amount of its self-confidence and charisma to its mixed ethnic roots, so the range of dancers from the Far East via North Europe and the Latino Americas is representative.

Can this really be only an afternoon’s travelling away from traffic-choked London? I’m waist-deep in wild blue lupins on a verdant Swiss mountain looking for a concert hall.

Mozart: The Four Horn Concertos Marc Geujon, Orchestre Paul Kuentz/Paul Kuentz (Calliope)