Iswi n tezrawt n usnilsan d tutlayt, akken tella deg yiwen n wakud synchronie, am unagraw yebnan ɣef tayunin tigejdanin  isɣalen  yesɛan yal yiwet  d taḥjurt n tnefsit mm sin wudmawen unmik  anekti  akked usnimek (image accoustique) dduklen s tmara.