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→Intervals Above vs. Intervals Below and Inversions
Chords can be inverted without changing their harmonic function (although it does affect their percieved qualities), but intervals are a bit more sensitive. See the example below.
fig. 811
d----2--------2--
a-2--2-----3--3--
P5 P4 m6 M3
Figure 8 11 first demonstrates an E-B P5 interval and its inversion, a B-E P4 interval, then an E-C m6 interval and its inversion, a C-E M3 interval. Inverting the perfect intervals only create a slight difference in perception, while inverting 3rds or 6ths has a larger impact. The composer cannot simply swap them willy-nilly - they clearly have different qualities in terms of overall harmony although they do sound related.
== C Major Scale on the 2nd String ==