, ▁Stra vin sky ▁used ▁C ▁major ▁on ▁top ▁of ▁F ▁major ▁( the ▁latter ▁presented ▁here ▁in ▁first ▁in version ): ▁ ▁The ▁device ▁uses ▁t ones ▁that , ▁together , ▁make ▁up ▁a ▁synth etic ▁hex at onic ▁scale ▁( 0 ▁ 1 ▁ 4 ▁ 6 ▁ 7 ▁t ). ▁When ▁en harm on ically ▁sp elled ▁C – D – E – G – G () – B , ▁it ▁is ▁called ▁the ▁tr it one ▁scale . ▁Alternatively , ▁when ▁sp elled ▁C – D – E – F – G – B , ▁it ▁can ▁be ▁read ▁as ▁the ▁auxili ary ▁dimin ished ▁scale . ▁ ▁The ▁ch ords ▁may ▁be ▁considered ▁to ▁contradict ▁each ▁other ▁because ▁of ▁the ▁tr it one ▁relationship : ▁" Any ▁t endency ▁for ▁a ▁ton ality ▁to ▁emer ge ▁may ▁be ▁avoided ▁by ▁introdu cing ▁a ▁note ▁three ▁whole ▁t ones ▁distant ▁from ▁the ▁key ▁note ▁of ▁that ▁ton ality ." ▁ ▁At ▁the ▁end ▁of ▁the ▁third ▁table au , ▁the ▁Pet r ush ka ▁ch ord ▁appears ▁with ▁Pet r ush ka ▁but ▁at ▁A ▁and ▁E , ▁which , ▁with ▁C ▁and ▁F , ▁create ▁a ▁dimin ished ▁sevent h ▁ch ord ▁( 0 , ▁ 3 , ▁ 6 , ▁ 9 ) ▁and ▁exhaust ▁the ▁oct at onic ▁scale ▁( 9 ▁ 1 ▁ 4 , ▁ 3 ▁ 7 ▁t , ▁ 0 ▁ 4 ▁ 7 , ▁and ▁ 6 ▁t ▁ 1 ▁=