Audio and video playback system and method for playing audio data applied thereto

A method for playing audio data, the method applied to an audio and video playback system, the audio and video playback system comprising a secondary audio device and an audio and video playback device having a local audio device, the method comprising:

• allocating a local audio buffer space and a secondary audio buffer space to the local audio device and the secondary audio device, respectively;
• processing obtained multimedia data to generate local audio data and secondary audio data;
• writing the local audio data and the secondary audio data to the local audio buffer space and the secondary audio buffer space, respectively;
• and
• reading the local audio data and the secondary audio data buffered in the local audio buffer space and the secondary audio buffer space to the local audio device and the secondary audio device, respectively, to have the local audio device and the secondary audio device play the local audio data and the secondary audio data, respectively.