Ключевые слова: atonal, atonality, augmented fourth, augmented ninth, augmented sixth, augmented sixth chord, chord, ebony, electric guitar, fingerboard, fingering, fingers, fret, frets, guitar, halfdiminished seventh chord, hand, harmony, left hand, minor seventh chord, richard wagner, sixstring electric guitar, sixstring guitar, steel, string, strings, suspended chord, suspension, tristan, tristan and isolde, tristan chord, tristan und isolde, wagner,