def cc(self, chan, ctrl, val):
        """Send control change value.

        The controls that are recognized are dependent on the
        SoundFont.  Values are always 0 to 127.  Typical controls
        include:
          1: vibrato
          7: volume
          10: pan (left to right)
          11: expression (soft to loud)
          64: sustain
          91: reverb
          93: chorus
        """
        return fluid_synth_cc(self.synth, chan, ctrl, val)