Help with using the Lattepanda to play a sound file, such as an mp3

Hi.

I need assistance with playing a sound file such as mp3 on a lattepanda with an embedded Arduino Leonardo. Her a like http://www.lattepanda.com/products/3.html 1

When I strike a key on my keyboard, I want a sound file to play until I withdraw my finger.

When I select "N" on my keyboard, the sound file will play and continue to repeat if it runs out of time. When I take my finger off the "N" key on my keyboard, the sound file ceases playing.

Thank you beforehand.