[4] She later continued her training on numerous study trips mainly to Paris, where she was tutored by Gabrielle Ritter-Ciampi, and to Berlin, working with Olga Eisner and Hertha Dehmlow throughout the late 1920s.

[5] In 1939, Richard Strauss personally invited Piltti to sing the challenging Zerbinetta aria from Ariadne auf Naxos at his 75th anniversary concert.

[7] Upon her return to Finland in 1943, Piltti initially received a cool reception due to her association with Nazi Germany, and it took many years for her talents to be appreciated again in her native country.

[1][5] Her singing career was effectively over, but later on, Piltti taught voice for over 20 years, in music institutes and conservatoires in Lahti, Jyväskylä, and Turku, as well as privately.

[4][3] Some of her more notable students included soprano Anita Välkki, bass Matti Salminen, and tenor Seppo Ruohonen.