Catchy melodies and spherical tunes alternate with full power passages, surprising the listener again and again with complex rhythms and virtuosic playing and soloing. An accurate description of the next great progressive fusion release from Wolfgang Zend and 7for4, entitled Diffusion. As the band like to point out, "Oil won't mix with water, but metal does with jazz. A DIFferent kind of FUSION, hence, Diffusion." Listen to Zenk describe the creative process, "How to compose a 7for4 song? Let's do some math first. Take 7 and add 4, then divide the result into 4 equal parts, as far as possible. You get an 11/8 beat with subdivisions 3-3-3-2. All you need to add to finish the song is some chords. How's that for mystic...?" Beyond the arithmetic, guitarists will recognize Zenk as one of the true European masters of the aggressive energetic fusion subgenre. Instrumental Guitar (Electric (Heavy)/Fusion/Progressive), total running time, 52:39