Tchaikovsky: Symphony No. 6 MusicAeterna/Teodor Currentzis (Sony)

Diethelm: Symphonic Works Royal Scottish National Orchestra/Rainer Held (Guild)

Shostakovich: Symphony No 6, Sinfonietta (Quartet No 8, arr. Abram Stasevich) Estonian Festival Orchestra/Paavo Järvi (Alpha Classics)

Brahms: Piano Concerto No. 2, Strauss: Burleske Joseph Moog (piano), Deutsche Radio Philharmonie/Nicholas Milton (Onyx)

Beethoven/Liszt: Complete Symphonies Yury Martynov (Erard, 1837 and Blüthner, 1867) (Alpha Classics)

Bach: Brandenburg Concertos 1-6 Berliner Barock Solisten/Reinhard Goebel (Sony)

Brahms: Clarinet Sonatas, Janáček: Sonata (arr. Brill) Shirley Brill, Jonathan Aner (piano) (Hänssler Classic)

Morton Feldman: Piano, Violin, Viola, CelloMark Knoop (piano), Aisha Orazbayeva (violin), Bridget Carey (Viola), Anton Lukoszevieze (cello) (Another Timbre)

CPE Bach: Tangere Alexei Lubimov (tangent piano) (ECM)

Remastered they may be, but the 20 live operas recorded here between 1949 and 1964 vary soundwise from clean at best to atrocious, with all the caprices of stage noise and audience participation seemingly acceptable at the time (so often there's the shouting prompter who seems duty bound to cue everything – even interjecting a loud libiamo! in the silence before the voices kick in for La traviata's Brindisi).