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Also, by having neither a major nor minor third, they give little indication about whether the current tonality takes a major or minor form. Suspended chords can occur in both major and minor keys.
== Inversions/Equivalence ==
The sus2 chord has the intervals:
R 2 5 R
-M2- -P4- -P4-
While the sus4 has:
R 4 5 R
-P4- -M2- -P4-
This means the chords are basically equivalent, simply using a different root note. 2nd inversion sus2 is a sus4, while 1st inversion sus4 is a sus2.
== Common Shapes ==