Disco has its roots in the Negro funk and soul, so-called vocal-bands 60 and California surf rock. The main distinguishing feature of the disc as a musical-stylistic phenomenon – even chetyrehdolny rhythm with an emphasis on each of the shares (often underlined kick drum). “Classic” is recognized as the pace at 120 beats per minute (which is almost twice the normal human heart rate). Characterized by continuous melodizirovannaya bass line, which often syncopations and “bouncing” rhythm patterns, broken octave passages, solo elements. The sound of the vocals by special methods of recording often takes sverhintimny character (proximity to the listener), highlights the performing means (“purr”, sighs, aspiration, a whisper). Overall, the sound is dry enough, smart, although arrangements are typical orchestral counterpoints, Solo Strings and Winds, adding “beautiful” in the overall score. In the late ’70s has become a greater emphasis be placed on “fashionable” synth sonority. The structure of the songs often consists of several blocks (with the change of pattern bass, melody, tonality, etc.), which does not allow long songs bore the listener.