Like it or not, we live – as Beethoven did – in interesting times. In place of the revolutions, wars and occupations that convulsed the cities he knew, we now confront a silent, invisible foe that breeds an equal terror. Hence the empty seats in the Royal Festival Hall on Sunday: a small proportion of the whole, but still noticeable.

Gustav Mahler and Richard Strauss are not the composers you'd hear at a typical chamber music concert. Their early efforts at piano quartets made up the first half of an evening at the Queen Elizabeth Hall with Benjamin Grosvenor and friends that was, in any case, far from typical. Topped off with the mature Brahms’s Third Piano Quartet, wasn’t it going to be too much rugged Alpine rocky road? In the hands of these youthful musicians, it wasn’t. The audience couldn’t get enough of them.

This concert represented the British leg of the NHK Symphony Orchestra’s European tour. Tokyo’s radio orchestra is Japan’s flagship ensemble, and they are fine advocates for the country’s thriving musical culture, the playing precise and the tone focused. Paavo Järvi is the orchestra’s Chief Conductor and a good fit for the orchestra’s sound. Järvi takes a similarly focused approach, expressive but never extrovert.

In Beethoven anniversary year, there are three ways to enhance our ongoing concert dialogues with the composer beyond the bog-standard overture-concerto-symphony format: complete cycles of the quartets, symphonies and sonatas, preferably without old vulgarians presenting; focusing on Beethoven and his contemporaries, including programmes recreated from the early 1800s; and linking the genius with what our own contemporaries have to say about him.

So many performances of Mahler's most theatrical symphony every season, so few conductors who have something radically fresh to say about it. Two who do are London Philharmonic Orchestra chief Vladimir Jurowski, perfecting his vision over the years, and now the Philharmonia's Principal Guest Conductor, Jakub Hrůša.

It’s Beethoven with everything for 2020, the composer’s 250th anniversary year. But the London Philharmonic has devised an interesting approach for their Beethoven-themed programming. “2020 Vision” is a series of concerts which couple a work by Beethoven, or occasionally one of his contemporaries, with a piece written 100 years later and another written 200 years later.

Visiting conductor Mark Wigglesworth is a good match for the Royal Philharmonic. The orchestra’s repertoire is usually at the popular end of the spectrum, so they know how to make the most of a good tune. Wigglesworth gives the players the space to phrase and shape the music, but his approach is more about drama and discipline. That’s a great musical virtue, but it’s hardly glamorous.

Of Wagner's four Ring operas, Siegfried poses the biggest casting problem. Most heroic tenors with the lungs to last the evening are not going to be ideal incarnations of the stroppy adolescent who learns and fights his way through an often nightmarish fairy-tale landscape. Torsten Kerl, not an agile mover to say the least, certainly wasn't.

In Beethoven anniversary year, there will probably be many more "Moonlight"s, meaning the Sonata, than the real thing (though we've been lucky to see the crescent in close conjunction with Venus these past two nights). Not many pianists would dare to place it at the beginning of a programme.

Concert programmes that set out to tell us a story can prove a mixed blessing. Yes, it’s valuable and stimulating to find ideas, and narratives, embodied in the musical flow. But great pieces, well-performed, have a habit of cutting loose from the frame of concepts someone has devised for them.