to allow audiovisual content to the viewer to to adapt to the attention level of its own, Audio signal processing apparatus (104, 106) comprises at least one complexity setting value indicating the complexity of the information (S_Inf-C), the control unit 106, audio-visual signal processing unit 104 is arranged to receive from the audio-visual signal and to process audio visual signal processing unit 104 Audio signal input to reduce or increase the information on the complexity of its accordance to be determined by the complexity of setting values (S_Inf-C) (S (A, V)), the arrangement, and it is arranged to at least processing an audio component (A) of the audio-visual signal processing unit 104 audio-visual signal (S (A, V)).
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