Deean's musical career began on a grand piano in a small courtyard in Ascona, where he sat down and started playing on a late summer day. This moment changed his whole life and fulfilled the prophecy of all of his music teachers. His music enlivened Ascona's sleepy streets and more and more people searched for the source of the sounds. The owner of the restaurant recognized Deean's talent and hired him for a month against board and lodging. Every evening the courtyard filled with enthusiastic listeners. After that month, Deean decided on his musical career.

To reassure his parents, Deean began studying at the ACM (Academy of Contemporary Music). Deean financed his studies with performances in piano bars all over Switzerland and was therefore very close to the audience from the beginning, learned to recognize the wishes in the eyes of the audience and to respond to them. Over the years as a musician, his career has led him through many successes, but Deean has remained true to his line: "Inspiring the audience is one of my favorite tasks."