Spectral index is the pseudonym of Czech producent Marek Salamon, who is also known as Ohm Plain and Neurochirurgy. This eclectic musician combines many styles that remelting in a distinctive mix of experimental electronica, ambient, IDM, musique concrète, soundart, sonorism, glitch, abstract hip-hop, contemporary music and jazz. While the project Ohm Plain was straightforward polystylish fusion of IDM, is tending toward the synthesizers in the sounds, a project Spectral index is significantly more complex musical structures and a greater emphasis on harmonic songs with complex beats creates multilayered often hard to digest an abstract mosaic, which is beyond not only from the closed style boxes.