+ struct { modified_degree_t degrees[4]; const char *name; } tetrachords[] = {
+ /* Sixth chords */
+ { {{1, 0}, {3, +1}, {5, 0}, {6, 0}}, "sus" SUP "6" PUS },
+ { {{1, 0}, {3, 0}, {5, 0}, {6, 0}}, "6" },
+ { {{1, 0}, {3, -1}, {5, 0}, {6, 0}}, "m6" },
+ { {{1, 0}, {2, 0}, {5, 0}, {6, 0}}, "msus2" SUP "6" PUS },
+ /* Seventh chords */
+ { {{1, 0}, {3, +1}, {5, 0}, {7, 0}}, "sus" SUP "M7" PUS },
+ { {{1, 0}, {3, +1}, {5, 0}, {7, -1}}, "sus" SUP "7" PUS },
+ { {{1, 0}, {3, +1}, {5, -1}, {7, -1}}, "sus" SUP "7♭5" PUS },