If ever there was a Prom to put London’s classical crowd in their place, to remind us (as those outside the capital so frequently and justifiably do) that the city isn’t the be-all and end-all of concert-going, then this was it. It featured three major debuts – all of them overdue, two of them musical hand-me-downs from Birmingham.

Beethoven: Symphonies 5-8 Copenhagen Philharmonic Orchestra/Lan Shui (Orchid)

He still looks every inch the golden boy, but Vasily Petrenko has just turned 40, and next month celebrates a decade with the Royal Liverpool Philharmonic. Time well spent, as this impressive evening revealed: after years of Russian immersion under his crisp command, here’s a band who can conjure Shostakovich’s smoudering darkness, and all the glitter and the grit in Rachmaninov’s third symphony.

If you go down to the woods today, to be sure of a big surprise is a contradiction in terms, but this pair of sylvan adventures by Matthias Pintscher and Mendelssohn was another example of the discreetly sensitive programme-building which has distinguished the present season of BBC Proms.

Some enchanted afternoon in Camden Town… the Proms returned to the Roundhouse after four decades with a dreamlike fusion of sound, space and light. Ron Arad’s Curtain Call – a 360° installation of 5,600 sillicon rods – encircled the London Sinfonietta and audience in its luminescent embrace, a haze of microtonal music slinking through a sequence of glimmering projections.

Remarkably, Pierre Boulez made his first appearance at the Edinburgh International Festival way back in 1948, at only the Festival’s second ever outing, in charge of music for director Jean-Louis Barrault’s production of Hamlet. He remained a regular visitor across the decades, and following his death in January, the EIF’s Pierre Boulez: A Festival Celebration was a late but clearly necessary addition to the Festival’s already bulging classical programme.

It's not so long since Daniel Barenboim sat around a table with Israeli officials telling him that Wagner couldn't be played in the homeland when someone's mobile fanfared the "Ride of the Valkyries", demolishing the opposition's case. At the opposite end of the scale to all that flash of battle-lust came last night's unexpected first encore to a Wagner second half – the Act Three Prelude to Die Meistersinger von Nürnberg.

The mid-way point of the BBC Proms has just passed. Attention during the eight-week season will inevitably tend to gravitate towards the novelties, “events” and one-offs, but one pre-condition for the summer to be going well is that the Proms' backbone ensemble, the BBC Symphony Orchestra, which plays no fewer than 12 of the concerts, has to be on good form. Ideally, they should be playing well across a wide range of repertoire, they should be getting full or nearly full houses, and their relationship with their principal conductor should be positive and productive.

Johann Friedrich Meister: Il giardino del piacere Ensemble Diderot/Johannes Pramsohler (dir. and baroque violin) (Audax Records)

The big yellow banners proclaiming "Welcome, world" are out. And judging by the seething, heaving crowds, a fair portion of the world has indeed descended on Edinburgh, where the annual August festivals season has now been up and running for just shy of a week.