virtual int message_epoint(unsigned int epoint_id, int message, union parameter *param);
virtual void set_echotest(int echotest);
virtual void set_tone(const char *dir, const char *name);
virtual int read_audio(unsigned char *buffer, int length);
virtual int message_epoint(unsigned int epoint_id, int message, union parameter *param);
virtual void set_echotest(int echotest);
virtual void set_tone(const char *dir, const char *name);
virtual int read_audio(unsigned char *buffer, int length);