Improving audio rendering by extracting a frequency band

An audio device comprising a processing chain arranged to acquire input audio channels and to produce output audio channels that are intended to be played back by a multichannel audio system, the processing chain comprising:

• a module for extracting frequency components belonging to a predefined frequency band, first audio channels that originate from the input audio channels being input into said module;
• a selection module arranged to select at least one audio channel, selected from among the first audio channels, and to control the extraction module so that it extracts said frequency components only from the at least one selected audio channel and not from at least one non-selected audio channel;
• a processing module arranged to carry out at least one processing operation that results in an interchannel delay on the at least one selected audio channel, from which said frequency components have been removed, and on the at least one non-selected audio channel, so as to produce processed audio channels;
• and
• an injection module arranged to add together said frequency components on each processed audio channel so as to produce second audio channels intended to be used to produce the output audio channels.