This was a performance laden with contradictions. After last weekend’s gargantuan Grande Messe des Morts, the standard issue Edinburgh Festival Chorus seemed much smaller – but not really small enough. The Scottish Chamber Orchestra was in its augmented format, almost up to symphony orchestra size, but playing in its increasingly popular authentic style with very little vibrato and the crunchy sound of natural brass instruments. Off to one side an organist struggled manfully to be heard on a chamber instrument no bigger than a celesta, and probably quieter.

There were two reasons why I didn’t return to the Albert Hall late on Friday night to hear Andras Schiff play Bach’s Goldberg Variations. The first was that one epic, Mahler’s Sixth in the stunning performance by Andris Nelsons and the Boston Symphony Orchestra, needed properly digesting. The other was that at Easter I’d heard Jeremy Denk play the Goldbergs in Weimar, and I wanted that approach to resonate, too – dynamic, continuous, revelatory, in a very different way from how I know Schiff approaches Bach.

It’s been glorious to hear so much Bach at this year’s Proms – most of it after dark, and still more of it for the most intimate of forces. On paper, the Academy of Ancient Music and BBC Singers’ Late Night concert of Bach choral works didn’t quite have the mystique of Ibragimova’s Solo Sonatas and Partitas, Schiff’s Goldbergs or Ma’s Cello Suites. In practice, though, it was clever piece of programming that came into its own in its Friday night slot, sending people home to the weekend on the very highest of musical highs.

Sir John Eliot Gardiner has made great play for years with the idea that Beethoven’s Fifth is a revolutionary symphony in not only musical but political terms. Accordingly the first bars were a call to arms, taking no heed of a restless Proms audience, or the Albert Hall’s generous acoustic, ploughing into and then through the argument with the joyful fury of a class war demo breaking police lines.

What would you expect of an ensemble performance played from memory? That the odd lapse, entirely understandable over the span of a 40-minute symphony, would be more than offset, perhaps, by gains in intimacy and flexibility as the players could look around and phrase together, respond to a conductor’s nudge and turn on a sixpence.

So to the second leg of Leif Ove Andsnes's journey through the Beethoven concertos, and a distressingly underpopulated Royal Albert Hall. Perhaps the punters were put off by the wintry weather, or perhaps by the dread names of Schoenberg and Stravinsky on the bill. Either way, it is shocking that Andsnes’s wonderful playing should have been to anything other than a full house.

Beethoven’s piano concertos have been no strangers to any Proms season. Only five years ago our own Paul Lewis embarked on a cycle not so very far, in terms of elegance and stylishness, from that of the present pianist-in-residence, Leif Ove Andsnes. Where Lewis proved a phenomenal trill-master, Andsnes’ runs and flights make his own approach especially rich and rare.

Though perhaps not quite the "long strange trip" once hymned by the Grateful Dead, Leif Ove Andsnes's Beethoven Journey has been a marathon undertaking. It has spanned four years, during which the Norwegian pianist and the Mahler Chamber Orchestra have toured the world, performing all five of Beethoven's piano concertos with Andsnes conducting from the keyboard. This week, they bring their trek to a close by performing the concertos, plus Beethoven's Choral Fantasy, at the Proms, opening on Thursday (23 July) and continuing on Friday and Sunday.

This Prom was the final concert of Andris Nelsons's remarkable seven-year spell as principal conductor of the City of Birmingham Symphony Orchestra. Their Prom showed the astonishing level of responsiveness and flexibility which he and they have achieved together, over the course of more than 300 concerts.

Canadian heroic tenor Jon Vickers, who died on Friday 10 July aged 88 and whose full life took him from work on a Saskatchewan farm to the great opera houses of the world, was inimitable, terrifying and titanic. Faced with the intense flavour of what follows, I can only write a sober short introduction to the magical words of our two contributors.