Victims of their own success in the postwar era of well-recorded sound, the Brandenburg Concertos first arrived in the ears of listeners from my generation via glossy, plush and polished recordings by heavyweight orchestras of a sort that would have baffled Bach. Four decades ago, period-conscious bands began to strip the gloopy varnish off and let the strange, bold paintwork beneath shine. 

Waiting, and hoping, may prove just as intense an experience as the fulfilment of a wish – or of a fear. Bach knew that, and infused his Easter Week music with a sense of suspense and anticipation built into vocal and instrumental lines that build and strive and stretch towards a climactic revelation that, until the very end, remains just out of reach. 

The turbulence and agitation of betrayal could be felt from the word go in this galvanising performance of the St John Passion, which administered a jolting urgency to Bach’s radical portrayal of the Easter story. The work will be 300 years old next year, yet this Polyphony Good Friday performance – a fixture at St John’s Smith Square for slightly fewer years – delivered a version as fresh and discomfiting as if the crucifixion had taken place yesterday.

A strong team of musical chefs can blend and spice Bach’s mighty Mass in B Minor in a variety of different ways, and still prepare a feast to savour. We don’t know exactly why Bach felt compelled to bundle his decades of genius into this late portmanteau showcase, only that he did – and that its credible interpretations can span contrasting views.

Mahler on modern instruments is ubiquitous these days, so historically informed performance is bound to be revealing. Here, the Orchestra of the Age of Enlightenment brought transparency and focus to Mahler’s often complex textures in his Fourth Symphony. The concert was programmed as a showcase for young South African soprano Masabane Cecilia Rangwanasha, whose voice is ideal for this repertoire.

In a year of absences and separations, here was another one we had to bear. Built around a programme of Baroque double concertos, last night’s Prom should have brought Nicola Benedetti and Alina Ibragimova together in a violin super-duo that promised marvels.

Can we go back to an older Glyndebourne-at-the-Proms vintage, where the chosen production was merely sketched out with variations suited to the venue, and performed in whatever evening dress might be appropriate?

Die Zauberflöte rarely attracts the plain cooks of the operatic world. Mozart’s farewell opera chucks so many highly-spiced ingredients into its outlandish pot – pantomime and parable, burlesque and ritual – that many productions opt for one show-off recipe that promises to unify all its flavours into a single, spectacular dish.

We live in a secular age, or so we’re told. Yet we seem to need rituals, the age-old practice and province of religion, as much as ever. It is the achievement of Peter Sellars and Sir Simon Rattle to present one without the other in their concert stagings – "ritualisations" – of the Bach Passions they have taken around Europe and to the US since the St Matthew was first shown this way in Berlin in 2011.

Standing next to the warm brown beast of a piano built by Blüthner in Leipzig in 1867, Sir András Schiff advised his audience last night to clear their minds and ears of preconceptions. He told us that his rendering of Brahms’s first piano concerto – tonight, he will return to play the second – “should be like a first performance”. In reality, he added, that premiere (in 1859) turned out to be “a colossal failure”.