Complex sentence: In 2007, he decided that Trance was indeed the genre he wanted to opt and it was then he focused on creating euphoric and uplifting trance music encompassing elements of classical music, new age, chill out and Ambient.
Split into simpler sentences: In 2007, he decided that Trance was indeed the genre he wanted to opt. He started creating euphoric and uplifting trance music with with a blend of classical music, new age, chill out and Ambient.