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••• but the challenge is formidable: stereo would let the listener come and go without loosing much of the 'width' perception, while surround needs him or her to remain somewhere near the center of the field.
••• le challenge est d'importance: si la stéréo tolère les déplacements de l'auditeur sans trop perdre de la perception de largeur, le surround en revanche l'oblige à ne pas trop s'éloigner du centre du champ.
