+ /* The sorting here is funny to keep the array in degree order
+ * after reducing each degree to an actual scale degree, (9 -> 2,
+ * 11 -> 4, 13 -> 6) */
+ struct { modified_degree_t degrees[5]; const char *name; } pentachords[] = {
+ /* Sixth plus 9 */
+ { {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {6, 0}}, "6/9" },
+ { {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {6, 0}}, "m6/9" },
+ /* Seventh plus altered 9 */
+ { {{1, 0}, {9, +1}, {3, 0}, {5, 0}, {7, -1}}, "7♯9" },
+ { {{1, 0}, {9, -1}, {3, 0}, {5, 0}, {7, -1}}, "7♭9" },
+ { {{1, 0}, {9, +1}, {3, 0}, {5, -1}, {7, -1}}, "7♭5♯9" },
+ { {{1, 0}, {9, -1}, {3, 0}, {5, -1}, {7, -1}}, "7♭5♭9" },
+ /* Ninth chords */
+ { {{1, 0}, {9, 0}, {4, 0}, {5, +1}, {7, 0}}, "sus" SUP "+M9" PUS },
+ { {{1, 0}, {9, 0}, {4, 0}, {5, +1}, {7, -1}}, "sus" SUP "+9" PUS },
+ { {{1, 0}, {9, 0}, {4, 0}, {5, 0}, {7, 0}}, "sus" SUP "M9" PUS },
+ { {{1, 0}, {9, 0}, {4, 0}, {5, 0}, {7, -1}}, "sus" SUP "9" PUS },
+
+ { {{1, 0}, {9, 0}, {3, 0}, {5, +1}, {7, 0}}, SUP "+M9" PUS },
+ { {{1, 0}, {9, 0}, {3, 0}, {5, +1}, {7, -1}}, SUP "+9" PUS },
+
+ { {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {7, 0}}, "M9" },
+ { {{1, 0}, {9, 0}, {3, 0}, {5, 0}, {7, -1}}, "9" },
+ { {{1, 0}, {9, 0}, {3, -1}, {5, 0}, {7, 0}}, "m" SUP "M9" PUS },
+ { {{1, 0}, {9, 0}, {3, -1}, {5, 0}, {7, -1}}, "m9" },
+ { {{1, 0}, {9, -1}, {3, -1}, {5, 0}, {7, -1}}, "m♭9" },
+ { {{1, 0}, {9, 0}, {3, 0}, {5, -1}, {7, 0}}, "M9" SUP "♭5" PUS },
+ { {{1, 0}, {9, 0}, {3, 0}, {5, -1}, {7, -1}}, "9" SUP "♭5" PUS },
+ { {{1, 0}, {9, 0}, {3, -1}, {5, -1}, {7, 0}}, "m" SUP "M9♭5" PUS },
+ { {{1, 0}, {9, 0}, {3, -1}, {5, -1}, {7, -1}}, "𝆩" SUP "9" PUS },
+
+ /* FIXME: I don't have names for these last three after
+ * dropping the 5th from the voicing. That suggests to me that
+ * I'm missing names for these with a perfect 5th in the list
+ * above. */
+ { {{1, 0}, {9, -1}, {3, -1}, {5, -1}, {7, -1}}, "𝆩" SUP "♭9" PUS },
+ { {{1, 0}, {9, 0}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "9" PUS },
+ { {{1, 0}, {9, -1}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "♭9" PUS },