RightStuf have launched a website for their release of Piano: The Melody of a Young Girl’s Heart, with video clips featuring the English dub and details on the cast:

Miu Nomura – Rebecca Soler
Yuuki Matsubara – Zoe Martin
Hitomi Nomura – Veronica Taylor
Akiko Nomura – Vibe Jones
Ms. Yuunagi – Eva Christensen
Shirakawa – Marc Diraison
Seiji Nomura – Sean Schemmel
Kazuya Takahashi – Michael Sinterniklaas
Takizawa – Drew Aaron
Nagazawa – Brian T. Schneider

Directed by Michael Sinterniklaas

While no studio is listed, the cast and Michael Sinterniklaas’ involvement as director would indicate NYAV Post.