Der Rosenkavalier is an opera of thresholds. Characters are caught between states – girlhood and marriage, lover and lover-no-more, woman and whatever lies beyond sexuality and desirability – while around them a city and a nation are also poised on the brink, blocking out the noisy winds of change with waltzes that swirl ever more urgently through parquet ballrooms and gilded staterooms. Doorways give way to doorways in Robert Carsen’s new production of the opera, drawing the eye endlessly forwards, though without ever revealing what really lies ahead.

Bruckner’s Third Symphony doesn’t so much begin as become audible. A steady heartbeat in the bass, oscillating violas lit from within by clarinets, and in the middle, slowly pulling clear of the texture, the proud, sombre trumpet motif to which Wagner himself agreed to attach his name.

Michael Nyman and The Tempest – Prospero’s Books and Noises, Sounds & Sweet Airs (MN Records)

Strauss: Ein Heldenleben, Four Symphonic Interludes from Intermezzo Melbourne Symphony Orchestra/Sir Andrew Davis (ABC Classics)

If the BBC were to plan a Proms season exclusively devoted to youth orchestras and ensembles, many of us would be delighted. Standards are now at professional level right across the board. 20 years ago, the National Youth Orchestra of Scotland (★★★★★) couldn't compare with its Great British counterpart; now, although the age ranges are slightly different and the (or should that be the) National Youth Orchestra (★★★★) has vast wind and brass sections, playing levels appeared equal.

"Because the world has outlived its own downfall, it nevertheless needs art." Paul Celan's words stand alongside Anselm Kiefer's Jacob's Dream, part of a stunning Surrealism-centric exhibition in the foyer of Salzburg's second and more amenable festival venue, the Haus für Mozart. What a meaningful motto it turned out to be for both of this year's major festival offerings, good and bad.

The Aurora Orchestra’s gimmick at Prom 21 was the same as in the last two seasons: playing a major classical symphony from memory. This was touted as an “astonishing feat” by the concert’s on-stage presenter Tom Service but, although unusual, is it really that extraordinary? When I go to the opera I am not moved to congratulate the singers on performing without music. In fact, the lingering on what should be an incidental feature was in danger of obscuring a more interesting point: the excellence of the orchestra’s actual playing.

It should have been a complete disaster. Not announcing your festival’s programme until barely a week before it started ought to have guaranteed that nobody knew about it – no press, no audiences, other plans made, other things booked.

But still they came. It’s testament to the Cottier Chamber Project’s now firmly established place in Scotland’s summer musical life – this is its sixth year – that even keeping audiences in the dark as to what was planned didn’t deter them.

It often sounds as though Richard Strauss makes the ascent of his Alpine Symphony in too many layers of clothes. Hopes were that Vladimir Jurowski and the London Philharmonic Orchestra would give us a characteristically sinewy, more lightly-clad mountaineer. What we got was something different: a perfect blending of rich textures, an objectivity that left humans more or less out of the natural landcapes, and an often swift expedition that gave space to climaxes.

“Bon soir, good evening! Nice to see you! To see you...” Four years after bidding an emotional farewell to the Usher Hall, the Gallic charmer is back, maybe slightly stouter, with a tinge of grey in a new beard, the great mop of curly red hair as unruly as ever. And that accent! As the anecdotes flow, stout middle-aged Edinburgers swoon as they imagine themselves drinking pastis on the Boulevard St Germain in the spring sunshine.