- virtual int audio_channels () const = 0;
- virtual AudioContent::Frame audio_length () const = 0;
- virtual int content_audio_frame_rate () const = 0;
- virtual AudioMapping audio_mapping () const = 0;
- virtual void set_audio_mapping (AudioMapping) = 0;
- virtual boost::filesystem::path audio_analysis_path () const;
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- int output_audio_frame_rate () const;
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- boost::signals2::connection analyse_audio (boost::function<void()>);
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- void set_audio_gain (float);
- void set_audio_delay (int);
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- float audio_gain () const {