When I first approached John Adams with the idea of making a documentary about him, he gently but firmly turned me down: he had unequivocally bad memories of a film made a few years back, an uncomfortable ride with a director who thought nothing of editing a sequence in which John spoke about one piece, while a completely different one was being played to illustrate his comments. When John had objected, the director in question had dismissively refused to make any changes.

In many ways the most well-tempered of conductors, Wolfgang Sawallisch (1923-2013) brought a peerless orchestral transparency and beauty of line to the great German classics. Even the most overloaded Richard Strauss scores under his watchful eye and ear could sound, as the composer once said his opera Elektra should, “like fairy music by Mendelssohn”.

Yesterday Kenneth Branagh was thanking Manchester – saying that he felt he had “come of age” the previous time he had performed Shakespeare in the city 25 years ago, the audience being so “generous, quick-witted and lively". He also thanked the city for having the determination and audacity, in the face of gloom and cuts, at the launch of its adventurous festival, to back to the hilt a biennial world-class arts extravaganza, which, among many notable headline acts has Branagh as lead in Macbeth (directed by Branagh and Emmy and Tony award-winning Rob Ashcroft).

As a south-east Londoner and a parent, I was overjoyed recently to discover the Blackheath Conservatoire and its range of family-friendly musical activities – and sad to realise that like so many arts institutions in the current climate it is under threat of closure. It is in fact in the very final stages of a fundraising drive to refinance its debt and prevent its demise – moving steadily towards a donation target of £175,000 needed by the end of this month.

While the history of 20^th-century music is undoubtedly the history of the 20^th century – from the decadent expressionism of fin-de-siècle Berlin to the imagined surrealist worlds of 1920s Paris – few composers lived or wrote the century quite as vividly as Witold Lutosławski. He is celebrating his centenary this year. Although latterly obscured by the reputations of his countrymen Szymanowski and Penderecki, Lutosławski’s music combines lyricism and a fiercely rigorous formalism to produce works whose narrative force is unequalled.

With the cuts still to bite deep, it's enterprising business as usual for both of London’s biggest concert-hall complexes and their satellite orchestras in the newly announced season to come. I use the word "complex" carefully, because as from September, the Barbican Centre, which already has access to LSO St Luke's up the road, will also be using the 608-seater hall constructed as part of its neighbouring Guildhall School of Music and Drama’s Milton Court development.

One of Russia’s greatest and most inspirational sopranos, Galina Vishnevskaya died on 11 December at the age of 86. To the world at large, she will probably be most famous for taking an heroic stand alongside her husband, cellist and conductor Mstislav Rostropovich, against the Soviet authorities over the treatment of Alexander Solzhenitsyn; in 1974, the couple were stripped of their citizenship as a result.

While living in Bombay in the late 1940s, betrayed by a business partner and his first marriage in the midst of painful implosion, Ravi Shankar decided to commit suicide. At the eleventh hour, a holy man, who happened to be passing by, knocked on his door asking for water. The man told Shankar that he was aware of his fateful decision. This wasn’t, he went on, the right time to be renouncing life. He had a great future ahead of him, the sadhu continued, and a major role to play in the dissemination of Indian music throughout the world.

Never mind the huge interpretative challenges; Mahler’s Eighth, dubbed the "Symphony of a Thousand" owing to the gargantuan forces the composer marshalled as conductor of its 1910 Munich premiere, needs an even greater mastery of logistics. Markus Stenz (b 1965), who has been chief conductor of Cologne’s 500-year old Gürzenich Orchestra since 2003 in addition to major posts at the Hallé and Hilversum's Radio Philharmonic Orchestra, had so far wielded a Mahler cycle of terrific impetus and fresh approach to detail.

“I am always fascinated by how much is in a voice, by their textures and qualities,” says composer Jocelyn Pook. “They’re like aural photographs of a person and you recognise them instantly.” We are in her studio in north London and Pook flicks through audio-files in her computer to prove the point. Some of the voices she was chosen for their inherent musicality – voices on answerphones rise upwards as questions are asked and intervals are sounded for multi-syllabic words.