+ uint8_t VolumeUp(const cec_logical_address source, bool bSendRelease = true);
+ uint8_t VolumeDown(const cec_logical_address source, bool bSendRelease = true);
+ uint8_t MuteAudio(const cec_logical_address source);
+ uint8_t GetAudioStatus(const cec_logical_address initiator, bool bUpdate = false);
+
+ bool TransmitActiveSource(void) { return false; }