/code>[override] <p></p><p></p><p> Chord name.
          The regular expression of name is /(o[0-9])?([A-Ga-g])([+#\-])?([a-z0-9]+)?(,[0-9]+[+#\-]?)?(,[0-9]+[+#\-]?)?/.
          The 1st letter means center octave. default octave = 5 (when omit).
          The 2nd letter means root note.
          The 3nd letter (option) means note shift sign. "+" and "#" shift +1, "-" shifts -1.
          The 4th letters (option) means chord as follows.
          <table ><tr><th>the 3rd letters</th><th>chord</th></tr><tr><