(self, factor, use_semitones=False)
return self
speed takes 2 parameters: factor and use-semitones (True or False).

        When use-semitones = False, a factor of 2 doubles the speed and raises the pitch an octave. The same result is achieved with factor = 1200 and use semitones = True.
speed takes 2 parameters: factor and use-semitones (True or False).
speed takes 2 parameters : factor and use - semitones ( True or False ) .
def speed(self, factor, use_semitones=False):
        """speed takes 2 parameters: factor and use-semitones (True or False).

        When use-semitones = False, a factor of 2 doubles the speed and raises the pitch an octave. The same result is achieved with factor = 1200 and use semitones = True.
        """
        self.command.append("speed")
        self.command.append(factor if not use_semitones else str(factor) + "c")
        return self
def speed ( self , factor , use_semitones = False ) : self . command . append ( "speed" ) self . command . append ( factor if not use_semitones else str ( factor ) + "c" ) return self