X-Git-Url: https://git.cworth.org/git?a=blobdiff_plain;f=scherzo.c;h=5c24a543baaf4e4f63a38d304fabacfd57f8c786;hb=3f6802b662f5e8c13fa44ea2e500da722f654a73;hp=b7acce963aef1d6f0f835ffd1738b486b633ab32;hpb=cce4a033b8375e0fd293070444e2affe0b3db4a6;p=scherzo

diff --git a/scherzo.c b/scherzo.c
index b7acce9..5c24a54 100644
--- a/scherzo.c
+++ b/scherzo.c
@@ -665,22 +665,40 @@ scherzo_analyze_chord (scherzo_t *scherzo)
 #define SUP "<span font='33' rise='30000'>"
 #define PUS "</span>"
 
-    struct { modified_degree_t degrees[3]; const char *name; } triads[] = {
+    struct { modified_degree_t degrees[3]; const char *name; } trichords[] = {
+	/* Triads */
 	{ {{1, 0}, {3, +1}, {5,  0}}, "sus" },
 	{ {{1, 0}, {3,  0}, {5, +1}}, SUP "+" PUS },
 	{ {{1, 0}, {3,  0}, {5,  0}}, "" },
 	{ {{1, 0}, {3, -1}, {5,  0}}, "m" },
 	{ {{1, 0}, {3, -1}, {5, -1}}, "°" },
-	{ {{1, 0}, {2,  0}, {5,  0}}, "msus2" }
+	{ {{1, 0}, {2,  0}, {5,  0}}, "msus2" },
+	/* Seventh chords with no 3rd */
+	{ {{1, 0}, {5, +1}, {7,  0}}, SUP "+M7" PUS },
+	{ {{1, 0}, {5, +1}, {7, -1}}, SUP "+7" PUS },
+	{ {{1, 0}, {5,  0}, {7,  0}}, "M7" },
+	{ {{1, 0}, {5,  0}, {7, -1}}, "7" },
+	{ {{1, 0}, {5, -1}, {7, -1}}, "7♭5" },
+	/* Seventh chords with no 5th */
+	{ {{1, 0}, {4,  0}, {7,  0}}, "M7sus" },
+	{ {{1, 0}, {4,  0}, {7, -1}}, "7sus" },
+	{ {{1, 0}, {3,  0}, {7,  0}}, "M7" },
+	{ {{1, 0}, {3,  0}, {7, -1}}, "7" },
+	{ {{1, 0}, {3, -1}, {7,  0}}, "m" SUP "M7" PUS },
+	{ {{1, 0}, {3, -1}, {7, -1}}, "m7" },
+	{ {{1, 0}, {2,  0}, {7,  0}}, "m" SUP "M7" PUS "sus2" },
+	{ {{1, 0}, {2,  0}, {7, -1}}, "m7sus2" },
     };
 
     struct { modified_degree_t degrees[4]; const char *name; } tetrachords[] = {
 	/* Sixth chords */
 	{ {{1, 0}, {4,  0}, {5,  0}, {6,  0}}, "6sus" },
-	{ {{1, 0}, {3,  0}, {5,  0}, {6,  0}}, "6" },
+	{ {{1, 0}, {3,  0}, {5,  0}, {6,  0}}, "6" }, /* Ambiguous with m7 */
 	{ {{1, 0}, {3, -1}, {5,  0}, {6,  0}}, "m6" },
 	{ {{1, 0}, {2,  0}, {5,  0}, {6,  0}}, "m6sus2" },
 	/* Seventh chords */
+	{ {{1, 0}, {4,  0}, {5, +1}, {7,  0}}, SUP "+M7" PUS "sus" },
+	{ {{1, 0}, {4,  0}, {5, +1}, {7, -1}}, SUP "+7" PUS "sus" },
 	{ {{1, 0}, {4,  0}, {5,  0}, {7,  0}}, "M7sus" },
 	{ {{1, 0}, {4,  0}, {5,  0}, {7, -1}}, "7sus" },
 	{ {{1, 0}, {4,  0}, {5, -1}, {7, -1}}, "7♭5sus" },
@@ -696,9 +714,9 @@ scherzo_analyze_chord (scherzo_t *scherzo)
 	{ {{1, 0}, {3, -1}, {5, -1}, {7, -2}}, "°" SUP "7" PUS },
 	{ {{1, 0}, {2,  0}, {5,  0}, {7,  0}}, "m" SUP "M7" PUS "sus2" },
 	{ {{1, 0}, {2,  0}, {5,  0}, {7, -1}}, "m7sus2" },
-	{ {{1, 0}, {2,  0}, {5, -1}, {7,  0}}, "m°" SUP "M7" PUS "sus2" },
-	{ {{1, 0}, {2,  0}, {5, -1}, {7, -1}}, "m𝆩" SUP "7" PUS "sus2" },
-	{ {{1, 0}, {2,  0}, {5, -1}, {7, -2}}, "m°" SUP "7" PUS "sus2" },
+	{ {{1, 0}, {2,  0}, {5, -1}, {7,  0}}, "°" SUP "M7" PUS "sus2" },
+	{ {{1, 0}, {2,  0}, {5, -1}, {7, -1}}, "𝆩" SUP "7" PUS "sus2" },
+	{ {{1, 0}, {2,  0}, {5, -1}, {7, -2}}, "°" SUP "7" PUS "sus2" }, /* Ambiguous with 7 */
 	/* Ninth chords voiced with no 5th */
 	{ {{1, 0}, {9,  0}, {4,  0}, {7,  0}}, "M9sus" },
 	{ {{1, 0}, {9,  0}, {4,  0}, {7, -1}}, "9sus" },
@@ -715,7 +733,8 @@ scherzo_analyze_chord (scherzo_t *scherzo)
     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" },
+	{ {{1, 0}, {9,  0}, {3, -1}, {5,  0}, {6,  0}}, "m6/9" },
+	{ {{1, 0}, {9, -1}, {3, -1}, {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" },
@@ -847,12 +866,12 @@ scherzo_analyze_chord (scherzo_t *scherzo)
 	    }
 	    break;
 	case 3:
-	    for (i = 0; i < ARRAY_SIZE (triads); i++) {
+	    for (i = 0; i < ARRAY_SIZE (trichords); i++) {
 		if (_chord_signature_matches (notes, num_notes,
-					      triads[i].degrees, 3,
+					      trichords[i].degrees, 3,
 					      inversion, &root))
 		{
-		    chord_name = triads[i].name;
+		    chord_name = trichords[i].name;
 		    goto CHORD_NAME_KNOWN;
 		}
 	    }