+ * key transposition
+
+ * caching breakpoints / saving them.
+
+ * key { C }
+
+ * use dstream feature in mi2mu
+
+ * qtor, btor, mtor-> tor( QUIET_ver ), tor( DEBUG_ver ), etc.
+
+ * use tors feature in lily
+
+ * do conventional keys (C G A, F B E, a e fis, d as des, etc ),
+ besides lists of flats/sharps