Behind Mellow In Blue is Mathias Heise, one of the world’s leading harmonica players. He was born in 1993 in Rødovre, just outside Copenhagen, Denmark. He started playing harmonica at the age of seven, and a few years later he also took up piano and keyboards. At the age of 20, Mathias Heise won the 2013 Chromatic Harmonica World Championship and in 2015, he was awarded ‘New Jazz Star of The Year’ in Denmark. "Harmonica virtuoso Mathias Heise,
one of the greatest talents in Danish jazz in many years." – Niels Overgård, Jazznyt.com