<<Not to nit pick but there should be an agreed on format for naming intervals. an interval of G--C is a 4th. if it is G#--C it is a dim4th. To see right away that you are talking about a 3rd perhaps Ab3--C4 should be used. There are execptions like C#--F, as in A--C#--F--A, the three contiguous 3rds in the A octave>> Yes, those are three contiguous "thirds" to the ear, but C# -- F is a diminished 4th (a perfect 4th contracted by a half-step). Even though they're the same notes to the ear, to be spelled correctly as a Major 3rd, it has to be Db -- F (b = flat), or C# -- E#. We've been through this before a few months ago, but these (incorrect spellings) arose from tuners traditionally referring to all the black keys as "sharps", disregarding rules of music theory. --David Nereson, RPT
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