The G Dorian no 4, diminished 5 Scale as one would find it on any conventionally tuned, equal tempered instrument. The diminished 5 helps closed the gap opened up by the missing fourth degree and restores some of the intervallic symmetry associated with dorian scales that is lost with that gap. The 300 cent minor third/augmented second that opens up on either side of that diminished fifth makes this one harmonically interesting.
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