Where does music come from? That’s the vital question posed to Sergei Rachmaninoff in Dave Malloy’s extraordinary 2015 chamber work, as the great late-Romantic Russian composer – stuck in his third year of harrowing writer’s block – tries to relocate his gift. It comes from others and from himself; from past and present; from everything and nothing. It is ephemeral, and yet it is at the core of his very being.

Weirdly enough, it was “Tea for Two” that definitively proved her class for me. As a second encore to Rachmaninov’s Third Piano Concerto, after a mesmeric transcription of that composer’s Vocalise, Yuja Wang’s goodbye treat channelled the mighty Art Tatum with a scrupulous respect for the jazz master’s timing and phrasing.

Ben Gernon is only 30 (and looks about ten years younger) but has been Principal Guest Conductor of the BBC Philharmonic since 2017. He really impressed in last night’s Prom but, after an exciting overture, things fell away a bit with an under-nourished Rachmaninov concerto and an enjoyable if not faultless second half of Tchaikovsky.

Our greatest Berlioz scholar, David Cairns, has called Le Damnation de Faust “an opera of the mind’s eye, not of the stage,” and I’ve certainly never seen a production that successfully staged its curious, episodic, actionless mixture of set piece, romantic brooding, and flickering cinematic imagery.

In a way, he was a second Bernstein.

There's now something of a gala atmosphere when the Orchestra of the Royal Opera House takes to the Covent Garden stage with its music director Antonio Pappano. Admittedly some of the players are not the same as when he took up his tenure, but the core relationship of 17 years - with the contract now extended to at least the end of the 2022/23 season - results in collegial music-making at an intense level which most orchestras can only dream about.

Pianists most often cite Radu Lupu alongside Martha Argerich and Grigory Sokolov as the greatest. So it was hardly surprising to see so many top musicians in a packed audience, buzzing with expectation for the 73-year-old Romanian's most recent UK appearance with a conductor he respects, Paavo Järvi. Lupu appeared at Steven Isserlis's 60th birthday event at the Wigmore towards the end of last year, but before that hasn't been seen here since 2014.

In the fourth performance of their UK tour, with Vassily Sinaisky replacing an indisposed Yuri Temirkanov, the St Petersburg Philharmonic gave a warm and rousing performance at Symphony Hall, Birmingham.

You get a lot of notes for your money in a two-piano recital - especially when seven pianists share the honours for two and a half hours' worth of playing time. Well, they did call it a marathon, crowning the London Piano Festival so shiningly planned by Katya Apekisheva and Charles Owen, and the baton passed seamlessly from two pairs of hands to the next.

Reaching for philosophical terms seems appropriate enough for two deep thinkers among Russian pianists (strictly speaking, Kolesnikov is Siberian-born, London-based). In what Kant defined as the phenomenal world, the tangible circumstances, there were equal if not always predictable measures of innocence and experience in these Wigmore recitals two days apart.