The two piano concertos of Shostakovich, though strikingly different from each other, have both become twentieth century classics. The first has long been one of Marc-André Hamelin's 'party pieces.' Hyperion was pleased to have the opportunity to pair him with Andrew Litton, a conductor who knows these works backwards and forwards (he has even recorded the second concerto as pianist). The resulting performances have a vitality and flair which places them amongst the greatest ever put to disc. The Shchedrin concerto, though less well-known, is no less enjoyable. There is brilliance in both the piano writing and the orchestration and the surprise addition of a jazz trio in the finale - including vibraphone and drum kit - is sure to bring the house down.

Louis Spohr's inventive streak is evident in his creation of the double quartet, a novel form that opened the string octet to new textural, antiphonal, and contrapuntal possibilities. However, like many of Spohr's other chamber experiments, his strategies occasionally led him into unintended compositional difficulties, and his results were most successful when he put aesthetic considerations over cleverness. Spohr's showy writing for the first violin, flamboyant and widespread in the Double Quartet No. 1, caused unevenness in the ensemble's balance and exposed the bareness of the other parts.

"Mozart Violin Sonatas," proclaims the main graphic of this release by pianist Cédric Tiberghien and violinist Alina Ibragimova. Then the track list title reads "Sonatas for keyboard and violin." In reality the program contains both types, for the two-CD set traverses much of Mozart's output for the two instruments, and his attitude toward the relationship between them changed over the course of his career.

This double-CD group of Mozart violin-and-piano sonatas can stand on its own, and the title merely reads Mozart Violin Sonatas. It is, however, the third installment in a consistently fine Mozart cycle from pianist Cédric Tiberghien and violinist Alina Ibragimova. Deeper in the graphics the sonatas are denoted as being "for keyboard and violin," and indeed it is the keyboard that plays the dominant role even as the ways in which Mozart shakes up this configuration is part of the interest.

Nikolai Demidenko's large-scale pianism suits Busoni's Bach transcriptions to a tee. Listen first to the E minor prelude; you sense that Demidenko truly revels in the music's declamatory syntax and booming bass lines. Part of this may have to do with the pianist's Fazioli concert grand, whose resonance cuts like a saber wrapped in a velvet cloak. Demidenko sculpts fluid paragraphs out of the D major fugue's superficially repetitious sequences, and takes the hybrid Fantasia, Adagio, and Fugue at a brisk, vehement clip. The pianist forges an effortless link between the unfinished fugue's last measures and Busoni's unmistakably crabbed conclusion.

In 1931 the pianist and muse Harriet Cohen invited all her principal composer friends each to make an arrangement of a work by J S Bach for inclusion in an album to be published by Oxford University Press. Published as A Bach Book for Harriet Cohen, it is recorded here for the first time by virtuoso pianist Jonathan Plowright. The disc is completed by eight other 20th century British Bach transcriptions.

Guillaume de Machaut was one of the most influential composers of the 14th century, and his secular love songs were as significant as his sacred masterpiece, the Messe de Nostre Dame. The Orlando Consort began its survey of Machaut's music with the 2013 album, Songs from Le Voir Dit, which was followed by The Dart of Love in 2015, and A Burning Heart in 2016, thus making Sovereign Beauty, their 2017 release on Hyperion, the fourth installment in this impressive series.

The Hungarian-British Takács Quartet is neither Czech nor American nor German, but it conveys the three national strands of these wonderful late Dvorák works as few others have ever done. Buyers interested in these pieces have a selection of top-notch recordings from which to choose, but they are urgently directed to this one.

Anatoly Alexandrov (1888-1982) - not to be confused with several other Russian composers with the name Alexandrov - was a Russian composer and pianist who wrote music in virtually all genres but mainly focused on the keyboard. The style is reminiscent of late Scriabin and, perhaps more than anything else, Medtner. Now, Alexandrov's music isn't, in the end, quite on the level of either of those composers, but this survey by Hamish Milne proves that Alexandrov is certainly a worthwhile encounter.

Busoni was not only one of the greatest pianists of his age but also a composer and theorist of daunting intellect. His three idols were Bach, Mozart and Liszt and this disc presents two transcriptions, and in the Fantasia contrappuntistica a colossal re-imagining, each paying tribute to the past while reflecting Busoni’s genius as both creator and re-creator.