The sonata performed with Ives's optional parts for flute and viola, in the 4th and 1st movements, respectively. Eds. recorded: Associated Music Publishers (sonata); Peer International Corp./Merion Music (songs). Compact disc. Duration (sonata): 48:16. Program notes by Paul Griffiths and biographical notes on the performers, and texts, in English with French and German translations (42 p. : ports.) inserted in container. Recorded Nov. 6-8, 2003 (songs) and Jan. 7-10, 2004 (sonata), at the Grosser Saal, Vienna Konzerthaus. Susan Graham, mezzo-soprano ; Pierre-Laurent Aimard, piano ; Tabea Zimmerman, viola ; Emmanuel Pahud, flute.