In search of relatively rare fabulous beasts like César Franck’s Piano Quintet – given a fantastical performance last night – you often have to take in the ubiquitous Shostakovich specimen, the modest work of a master using simple means to his own creative ends that doesn’t bear too much repeated listening over a short space of time.

After full orchestral performances of Brahms’s Violin Concerto and First Symphony, the Scottish Chamber Orchestra shone a more intimate light on the composer’s oeuvre with a recital of chamber works in Edinburgh’s Queen’s Hall on Sunday.

It’s not often that the most bittersweet moment in a rich concert comes in the encore. Elisabeth Leonskaja had already played the generous extra in question, the Dumka movement of Dvořák’s A major Piano Quintet, with the Staatskapelle Quartet only a fortnight earlier. Here, fine-tuned with the Jerusalems, that moment when the joyfully flowing episode turns dark and the piano seems to call from a dark wood proved sheer magic.

It’s dangerous to claim a sense of absolute rightness about a musical performance; that could mean no more than responding to an interpretation which happens to chime with your own subjective expectations. Yet I’m happy to stick my neck out and say that the partnership of septuagenarian pianist Elisabeth Leonskaja with the young Staatskapelle Quartet of Berlin felt absolutely right in works by Brahms that cry out in every bar for authentic musicianship (★★★★★).

The Castalian String Quartet is half what I remember, but only literally: while viola-player Charlotte Bonneton and cellist  Christopher Graves may have departed, their replacements, Ruth Gibson and Steffan Morris, more than earned their laurels in last night’s stunning programme.

While the call for livening up the concert format remains dubious – beyond unusual settings and a will to communicate, the rest is window-dressing – there’s always a special buzz about festival-like concatenations of events. For that reason, four one- or two-day chamber spectaculars have stood out for me this year.

There can be few currently operating musicians who have a sound as distinctive as Craig Fortnam’s. Whether solo or with his erstwhile band The North Sea Radio Orchestra, his writing has a kind of zig-zagging melody that’s part Robert Wyatt, part early Kate Bush, part medieval, part super modern, but all Fortnam.

In some ways the concerto da camera was the 18th-century music equivalent of the hatchback – only slightly larger in scale than a basic chamber work but with an ambition that allowed it to carry ideas associated with more substantial structures.

At St John’s Smith Square, the dynamic ensemble El Gran Teatro del Mundo gave a diverting tour of this distinctive form, titled "The Art of Conversation", taking us from Germany down to the Mediterranean through Italy and Spain before circling back to Germany again.

How do they do it? Kaleidoscope Chamber Collective ticks all the boxes of diversity and reaching out to all ages without needing to draw attention to it all. The answer is quite simple: the repertoire – in Saturday’s morning and afternoon concerts, French chamber music both known and unfamiliar – is beautifully chosen and programmed, the performers all born communicators as well as musicians at the highest level.

A 150th birthday cornucopia was anticipated: vintage chamber and vocal Vaughan Williams in a big Wigmore Hall three-parter alongside music by other great Brits. It turned out, instead, to be a handsome if overlarge horn sounding several cracked notes.