Question: I Let The Music Speak is a compilation album by Swedish singer Anne Sofie von Otter, born on which date, she's a mezzo-soprano?

Context paragraphs:
De første og Største hits: De første og Største hits is a compilation album by the Danish singer Anne Gadegaard.  It was released in 2006 and as with Anne Gadegaard's previous studio albums, it was not released in the UK or the US.  The title translates as ""The First and Greatest hits"".  The album reached #10 on the Danish album charts and #29 on the Norwegian album charts.  This compilation album contains two bonus tracks, "Shoo Bi Doo" and "Gi Mig Alt".

Senza sangue: Senza sangue (Without blood) an opera in one act by Péter Eötvös with a libretto by Mari Mezei.  It is based on the second part of the novel of the same name by Alessandro Baricco and is intended to be performed jointly with Béla Bartók's one-act "Bluebeard's Castle".  The concert première was given by the Cologne Philharmonic Orchestra on 1 May 2015.  It was premièred in full on 15 May 2016 at the Festival d'Avignon.  It is his tenth opera.  Anne Sofie von Otter, who gave the New York première with the New York Philharmonic, said: "“The piece is not at all easy for the two singers... [It’s] hard to find the pitch; you have to work it into the voice, unless of course you happen to have perfect pitch, which I don’t."

Roger Vignoles: Roger Vignoles, born 12 July 1945, is a British pianist and accompanist.  He regularly performs with the world's leading singers, including Kiri Te Kanawa, Thomas Allen, Anne Sofie von Otter, Thomas Hampson, Gitta-Maria Sjöberg, Sarah Walker, Sylvia McNair, Susan Graham, Christine Brewer, Felicity Lott, Stephan Genz, Monica Groop, Wolfgang Holzmair, Bernarda Fink, Christine Schäfer, Brigitte Fassbaender and Kathleen Battle.  He also accompanies instrumentalists such as Joshua Bell, Heinrich Schiff, Nobuko Imai and Ralph Kirshbaum, and gives masterclasses around the world.

Anne Sofie von Otter: Anne Sofie von Otter (born 9 May 1955) is a Swedish mezzo-soprano.  Her repertoire encompasses lieder, operas, oratorios and also rock and pop songs.

Göran von Otter: Baron Göran Fredrik von Otter (4 August 1907 – 4 December 1988) was a Swedish diplomat and "friherre", best known for his service in Berlin during World War II.  Anne Sofie von Otter is von Otter's daughter; former Swedish Prime Minister Fredrik von Otter was his grandfather.

Terezín - Theresienstadt (Anne Sofie von Otter album): Terezín - Theresienstadt (Anne Sofie von Otter album)

Bengt Forsberg: Bengt Forsberg (born 1952) is a Swedish concert pianist most famous for his numerous collaborations with the mezzo-soprano Anne Sofie von Otter.  He participated in her project to record songs written in the concentration camp of Terezín.  Forsberg has a reputation as a champion of neglected music and composers.  He is highly acclaimed as a recital accompanist and regularly plays alongside Mats Lidström and Nils-Erik Sparf.

Love Songs (von Otter–Mehldau album): Love Songs is an album by the mezzo-soprano Anne Sofie von Otter and the pianist Brad Mehldau.  The album was released on October 26, 2010.

I Let the Music Speak (album): I Let The Music Speak is a compilation album by Swedish singer Anne Sofie von Otter.

For the Stars: For the Stars is a 2001 album by classically trained Swedish mezzo-soprano Anne Sofie von Otter, produced by Elvis Costello.

Supporting paragraphs: I Let the Music Speak (album) Anne Sofie von Otter
Answer: 9 May 1955