Since you are interested in Tragediennes Vols 1 - 3, here is a list of other items that you may find interesting.
DEBUSSY / JANACEK / RAVEL / NIELSEN / BRAHMS / SCHUMANN
Violin & Viola Sonatas
Christian Tetzlaff (violin) / Lars Anders Tomter (viola) / Leif Ove Andsnes (piano)
[ Virgin de Virgin / 2 CD - released 2/Sep/2002 ]
Rosette (Highest Award) Penguin Stereo Guide
GLUCK / MASSENET / BERLIOZ / MEHUL / SAINT-SAENS / etc
Veronique Gens (soprano) / Les Talens Lyriques, Christophe Rousset (director)
[ Virgin Classics / CD - released 1/Feb/2012 ]
"she tackles roles usually assigned to mezzo-sopranos, such as Fidès in Meyerbeer's Le Prophète, Didon in Berlioz's Les Troyens and Massenet's Hérodiade, but her shining soprano is especially gorgeous in the rarities...Rousset's period band supplies...