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audio [Interfaces] Detailed Description The audio interface is used to control sound hardware, if equipped. Classes struct   player_audio_data   Data. More... struct   player_audio_cmd   Command. More... Defines #define  AUDIO_DATA_BUFFER_SIZE   20 #define  AUDIO_COMMAND_BUFFER_SIZE   3*sizeof(short) Typedefs typedef player_audio_data  player_audio_data_t   Data. typedef player_audio_cmd  player_audio_cmd_t   Command. Define Documentation #define AUDIO_DATA_BUFFER_SIZE   20 #define AUDIO_COMMAND_BUFFER_SIZE   3*sizeof(short) Typedef Documentation typedef struct player_audio_data player_audio_data_t   Data. The audio interface reads the audio stream from /dev/audio (which is assumed to be associated with a sound card connected to a microphone) and performs some analysis on it. Five frequency/amplitude pairs are then returned as data. typedef struct player_audio_cmd player_audio_cmd_t   Command. The audio interface accepts commands to produce fixed-frequency tones through /dev/dsp (which is assumed to be associated with a sound card to which a speaker is attached).