code: def cc(self, chan, ctrl, val):
          
          return fluid_synth_cc(self.synth, chan, ctrl, val)
docs: 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