Although this is a re-issue, and not a re-mastering, everyone with any interest in Wagner, and Tristan and Isolde, simply must have this wonderful set. To be fair, it's really all about Linda Esther Gray, and the outstanding WNO under Goodall. The WNO are brilliant here, and sympathetically recorded by the Decca engineers. You'll hear subtleties in the playing that are lost in other versions, and you can forget about Goodall's supposed ultra-slow tempi, for here he's surely perfect. (The Prelude is actually over a minute faster than Karajan.) But it's Goodall's handling of key moments that is so seductive - and thrilling.

Martha Argerich does not give solo piano recitals anymore. She does something better: she plays duo piano and chamber music with her friends and students. She's been doing it for a couple of decades, and willful as she is, she probably won't change. Besides, when it comes to duo piano and chamber music recitals, Argerich with her friends and students can't be beat. Take, for example, this three-disc set of performances taken from the 2005 Lugano Festival.

The French pianist Marcelle Meyer made these recordings of music by Francois Couperin, Rameau, Domenico Scarlatti and Rossini in Paris between 1946 and 1955. Celebrated for her performances of French piano music, notably perhaps that of Chabrier, Debussy and Ravel, Meyer was none the less a zealous champion of the eighteenth-century harpsichordists. Bach's keyboard music played an important part in her daily studies and, together with Couperin, Rameau and Scarlatti, occupied a significant place in her public recital programmes.

For many years there have been rumours that Pinchas Zukerman, one of the world's outstanding viola players in addition to being a supreme violin virtuoso, would match Sir Yehudi Menuhin's feat of recording both these Walton concertos as he did for EMI. In the event Nigel Kennedy has neatly stepped in, and—with the uniquely expert guidance of Andre Previn—produced a recording of both works which in this coupling is unlikely to be bettered for a long time. Even next to the finest individual recordings of the two works, differently coupled, Kennedy provides formidable competition.