Ahead of World Mental Health Day, Iain looks at different approaches to musical sanity. Including: Schulz: Largo Thomas Bloch (Glass Harmonica) Naxos 8.555295 Schumann: Piano Quintet (2nd mvt) Menahem Pressler (piano) Emerson Quartet DG 4458482 Britten: Rejoice in the Lamb, Peter Barley (organ) Choir of King's College Cambridge Stephen Cleobury (director) Argo 4332152 Sun Ra: Cosmic Tones for Mental Therapy (Cluster of Galaxies) Sun Ra and his Solar Arkestra EVIDENCE ECD220362 Johann Strauss: Schnee-Glöckchen, Op 143 Polish State Philharmonic Orchestra Oliver Dohnanyi (conductor) MARCO POLO 8223207 Rachmaninov: Prelude in G, Op 32 No 5 David Helfgott (piano) RCA 74321403782 Scarlatti: Sonata in A, L483 Vladimir Horowitz (piano) Favourite Encores CBS CD42305 Joni Mitchell: Twisted Asylum K253002 Ivor Gurney: When Smoke stood up from Ludlow Andrew Kennedy (tenor) Simon Crawford Philips (piano) Dante Quartet Signum Stravinsky: The Rake's Progress (closing scene in Bedlam) Deborah York (soprano) Bryn Terfel, Ian Bostridge (tenors) Monteverdi Choir LSO John Eliot Gardiner (conductor) DG 4596482 Smetana: String Quartet No 2 The Linsay String Quartet ASV CDDCA777 Wolf: Manuel Venegas Mitsuko Shirai (mezzo-soprano), Josef Protschka, Christoph Spath, Kor-Jan Dusseljee (tenors), Cornelius Hauptmann (bass), Oliver Widmer (baritone) Stuttgart Chamber Choir Hartmut Holl (conductor) Capriccio 10362CAP Schoenberg: Pierrot Lunaire (part 3) Christine Schäfer (soprano) Ensemble InterContemporain Pierre Boulez (conductor) DG 457630 Sorabji: Opus clavicembalisticum/Introito John Ogdon (piano) Altarus 9075.