What do visiting German performers add to the Edinburgh International Festival's Auld (Scotland-France) Alliance thread? Simple: when they communicate as superbly as soprano Diana Damrau and Jonathan Nott's Bambergers, the music-making works at the highest level. The fact that Damrau enlisted French harpist Xavier de Maistre for one of the most singular song recitals I've ever heard, and that the symphony concert set Messiaenic pianist Pierre-Laurent Aimard at its centre, simply gave us more for our money in a cavalcade of light to illuminate the grey tail-end of the festival.

All aboard the chrome locomotive for composer-conductor Oliver Knussen’s annual magical mystery tour. You may notice rather few fellow passengers in the Albert Hall; that’s a given with this event (though the Proms could have thrown in and advertised one of Olly’s Top 10 OTT Favourites – I’ve heard him proclaim them - to drum up more trade). You may also find rather too many stops for change of crew. But so long as you sit forward to catch the results of his famously acute hearing, second only to Boulez’s, you’ll get something out of a long, unsexy ride.

If much of the Austro-German repertoire is about hiking to a spiritual peak, the Franco-Spanish is about diving down to the orchestral depths. The music of Ravel, Debussy and Falla has beefy shoulders and powerful legs. But the vast watery expanse of the Royal Albert Hall is hard-going even for these expert paddlers. I've never seen anything by these composers that hasn't drowned in this space. So I came to last night's concert hoping that the BBC Philharmonic's new Spanish conductor, Juanjo Mena (he takes over officially next season), would show us all how to ride out these waters.

This week we review Bellérophon, a rare Baroque opera from Lully which was exhumed by Christophe Rousset and performed for the first time last year, Debussy recorded live from the Barbican, and we answer the key question: how much is too much Percy Grainger? Would, for example, 19 discs be considered sufficient?

It’s Holy Wednesday in Cuenca, and going round the corner into Cathedral Square I’m surrounded by hordes of guys in multicoloured mufti who look like the Ku Klux Klan, with unnecessarily pointy hoods. Twenty of them are carrying a heavy float with a large statue of Jesus on it. In Cuenca things are fairly austere, compared to other places where there’s a lot of self-whipping, or where, if you have sin on your conscience, you may end up banging nails into your hands, as in Mexico. Still there are alternative amusements – the Copa Del Rey final of Real Madrid v Barcelona is blaring out of bars – and it’s the 50th edition of Cuenca’s Religious Music Festival.

Despite footsteps in the snow, as creepily characterised by Debussy's prelude of the same name, and sleighbells to launch a childlike symphonic journey, interior illumination should have been at the core of this concert. Sadly, given Colin Matthews's refined but fussy designer lighting in his Debussy orchestrations, a low-wattage Rimbaud/Britten zoo from one-tone soprano Christine Schäfer and hard sunbeams failing to probe the inner mysteries of the tomb-effigies Mahler envisaged in his Fourth Symphony's slow movement, it wasn't. Fortunately Vladimir Jurowski found novelty enough elsewhere to keep us from slumping in the semi-dark.

It was one of those moments that every conductor (and orchestra) dreads: “The Procession of the Sage” from Stravinsky’s The Rite of Spring is in rip-roaring full cry, percussion grinding and scratching, high trumpet screeching – but Daniele Gatti, it would seem, loses a bar somewhere and gives his Orchestre National de France a premature cut-off, leaving the entire brass section between a rock and a hard place. Stop or play on? An ignominious collapse ensues – as big a blunder as I’ve heard in any professional concert in years. Who says The Rite of Spring no longer has the capacity to shock?

"There is not one idea," wrote that intemperate critic Eduard Hanslick about Richard Strauss's Till Eulenspiegel, "that does not get its neck broken by the speed with which the next lands on its head." Rather a compliment, I've always thought, and certainly so as applied to James MacMillan's new Violin Concerto. As soloist Vadim Repin and conductor Valery Gergiev whirled us tumultuously through its hyperactive songs and dances, there was so much I wanted to savour, to hear again. That won't be a problem.

Heading up this month's classical selection is a 16-CD budget box set of the complete works of Frédéric Chopin, issued to celebrate the 200th anniversary of the consumptive Pole's birth. Plus we review a rare piano concerto by Ralph Vaughan Williams, a disc of even rarer string orchestra works by the post-war Polish composer Grażyna Bacewicz, a fresh coupling of the Debussy and Ravel string quartets, a new version of Bruckner's mighty Eighth from the French-Canadian wunderkind Yannick Nézet-Séguin and two sets of historic recordings conducted by "Glorious John" Barbirolli.