After leaving Tangerine Dream in 1987 to explore new creative concepts and directions, Franke founded the Berlin Symphonic Orchestra in an effort to combine his signature "musical expressions" with an equal balance of orchestral, ethnic and electronic music. During this period, Franke released his first solo album, Pacific Coast Highway, followed by The London Concert in 1992. In 1994 he released Enchanting Nature, the positive response to that album paved the way for his biggest-selling solo effort to date, The Celestine Prophecy - A Musical Voyage which is considered by many to be one of the most creative new age albums ever produced. This was followed by a unique collaboration, Transformation Of Mind, which paired several poetic readings by Deepak Chopra, along with nine delicate compositions by Franke.
While being recognized as a major force in new age music, Franke has also garnered a tremendous amount of attention for several film and television scores including Babylon 5 and Tarzan And The Lost City.