Audio Sophistication

Audio sophistication refers both to the clarity and richness of the sound as well as to the number of channels it supports.  It is measured on an index from 1 to 9.  The index at level 1 represents mono sound.  At level 2 it represents stereo sound. At level 3 it represents stereo with early generation Dolby sound enrichment and clarity.  From level 4, sophistication increases as channels increase to four and then to 5.1 (including a subwoofer), 6.1, 7.1 and finally 10.2 for the extremely sophisticated home cinema with twelve speakers.  Similarly, as the number of channels increases, the sound enrichment progresses from early Dolby enhancement to Dolby Pro Logic, DTS, SDDS, Dolby Pro Logic II, Dolby Digital EX, DTS-ES and finally DTS-HD, true high definition sound.