class RFAudioCoder :

    def ExportAudio( self, protocol=None, message=0 ) :
        """Export a message code to default audio device.

        Args:
            protocol: Protocol used to encode message
            message:  Message to encode (numeric format)
        """

    def ExportWAV( self, protocol=None, message=0, dest="" ) :
        """Export a message code to a WAV file.

        Args:
            protocol: Protocol used to encode message
            message:  Message to encode (numeric format)
            dest:     Destination WAV file to be written
        """
    
    def SetAudioFrequency( self, audio_freq=8000 ) :
        """Set the audio frequency used to encode the messages (default: 8000Hz)"""

    def SetMessageRepeat( self, msg_repeat=8 ) :
        """Set the repeat times of the encoded message (default: 8)"""

    def SetMessageBitLength( self, msg_bits=24 ) :
        """Set the message data bit length (default: 24)"""