Details of stereophonic systems covered by H04S but not provided for in its groups

Child Classifications

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• H04S 2400/01 Multi-channel, i.e. more than two input channels, sound reproduction with two speakers wherein the multi-channel information is substantially preserved
• H04S 2400/03 Aspects of down-mixing multi-channel audio to configurations with lower numbers of playback channels, e.g. 7.1 -> 5.1 (H04S2400/01 takes precedence)
• H04S 2400/05 Generation or adaptation of centre channel in multi-channel audio systems
• H04S 2400/07 Generation or adaptation of the Low Frequency Effect [LFE] channel, e.g. distribution or signal processing
• H04S 2400/09 Electronic reduction of distortion of stereophonic sound systems
• H04S 2400/11 Positioning of individual sound objects, e.g. moving airplane, within a sound field (H04S2420/13 takes precedence)
• H04S 2400/13 Aspects of volume control, not necessarily automatic, in stereophonic sound systems
• H04S 2400/15 Aspects of sound capture and related signal processing for recording or reproduction