Ekusetshenzisweni komsindo ozungezayo, i-Dolby AC3 kanye ne-DTS zinesici sokuthi zidinga izipikha eziningi ngesikhathi sokudlala. Kodwa-ke, ngenxa yezizathu zamanani nesikhala, abanye abasebenzisi, njengabasebenzisi bekhompyutha ye-multimedia, abanazo izipikha ezanele. Okwamanje, kudingeka ubuchwepheshe obungacubungula amasignali eziteshi eziningi futhi buwadlale ngezipikha ezimbili ezihambisanayo, futhi benze abantu bazizwe ngomphumela womsindo ozungezayo. Lobu ubuchwepheshe bomsindo ozungezayo obonakalayo. Igama lesiNgisi lomsindo ozungezayo obonakalayo yi-Virtual Surround, ebizwa nangokuthi i-Simulated Surround. Abantu babiza lobu buchwepheshe ngobuchwepheshe bomsindo ozungezayo ongeyona ejwayelekile.

Uhlelo lomsindo ozungezayo olungejwayelekile lusekelwe ku-stereo yeziteshi ezimbili ngaphandle kokwengeza iziteshi nezipikha. Isignali yensimu yomsindo icutshungulwa yisekethe bese isakazwa, ukuze umlaleli ezwe ukuthi umsindo uvela ezindleleni eziningi futhi ukhiqize insimu ye-stereo elingisiwe. Inani lomsindo ozungezayo ongokoqobo Inani lobuchwepheshe obuzungezayo obubonakalayo ukusebenzisa izipikha ezimbili ukulingisa umphumela womsindo ozungezayo. Nakuba kungenakuqhathaniswa nethiyetha yangempela yasekhaya, umphumela ulungile endaweni engcono kakhulu yokulalela. Ububi bawo ukuthi ngokuvamile awuhambisani nokulalela. Izidingo zesikhundla somsindo ziphezulu, ngakho-ke ukusebenzisa lobu buchwepheshe obuzungezayo obubonakalayo kuma-headphone kuyisinqumo esihle.

Eminyakeni yamuva nje, abantu baqale ukutadisha ukusetshenziswa kweziteshi ezimbalwa kakhulu kanye nezikhulumi ezimbalwa kakhulu ukudala umsindo onezinhlangothi ezintathu. Lo mphumela womsindo awulona iqiniso njengobuchwepheshe bomsindo ozungezile obuvuthiwe njenge-DOLBY. Kodwa-ke, ngenxa yentengo yawo ephansi, lobu buchwepheshe busetshenziswa kakhulu kuma-amplifiers kagesi, kumathelevishini, kumsindo wemoto kanye nakwi-multimedia ye-AV. Lobu buchwepheshe bubizwa ngokuthi ubuchwepheshe bomsindo ozungezile obungejwayelekile. Uhlelo lomsindo ozungezile olungejwayelekile lusekelwe ku-stereo eneziteshi ezimbili ngaphandle kokwengeza iziteshi nezikhulumi. Isignali yensimu yomsindo icutshungulwa yisekethe bese isakazwa, ukuze umlaleli azizwe ukuthi umsindo uvela ezindleleni eziningi futhi ukhiqize insimu ye-stereo elingisiwe.

Isimiso Somsindo Ozungezile Ongokoqobo Isihluthulelo sokuqaphela i-Virtual Dolby Surround Sound ukucubungula umsindo ngendlela ebonakalayo. Igxile ekucubunguleni iziteshi zomsindo ozungezile ngokusekelwe ku-acoustics yomuntu kanye nezimiso ze-psychoacoustic, okudala umbono wokuthi umthombo womsindo ozungezile uvela ngemuva noma ohlangothini lomlaleli. Imiphumela eminingana esekelwe ezimisweni zokuzwa komuntu iyasetshenziswa. Umphumela we-Binaural. Isazi sefiziksi saseBrithani uRayleigh sathola ngokuhlola ngo-1896 ukuthi izindlebe ezimbili zabantu zinomehluko wesikhathi (ama-microsecond angu-0.44-0.5), umehluko wokuqina komsindo kanye nomehluko wesigaba semisindo eqondile evela emthonjeni ofanayo womsindo. Ukuzwela kokuzwa kwendlebe yomuntu kunganqunywa ngokusekelwe kulezi zinto ezincane. Umehluko unganquma ngokunembile isiqondiso somsindo futhi unqume indawo yomthombo womsindo, kodwa ungakhawulelwa kuphela ekunqumeni umthombo womsindo ohlangothini oluvundlile ngaphambili, futhi awukwazi ukuxazulula ukuma komthombo womsindo wendawo onezinhlangothi ezintathu.

Umphumela we-auricular. I-auricle yomuntu idlala indima ebalulekile ekubonakalisweni kwamagagasi omsindo kanye nesiqondiso semithombo yomsindo wendawo. Ngalesi siphumo, indawo yomthombo womsindo enezinhlangothi ezintathu inganqunywa. Imiphumela yokuhlunga imvamisa yendlebe yomuntu. Indlela yokuthola umsindo wendlebe yomuntu ihlobene nemvamisa yomsindo. I-bass engu-20-200 Hz itholakala ngomehluko wesigaba, ibanga eliphakathi elingu-300-4000 Hz litholakala ngomehluko wokuqina komsindo, kanti i-treble itholakala ngomehluko wesikhathi. Ngokusekelwe kulesi simiso, umehluko wolimi kanye namathoni omculo emsindweni ophindaphindwayo ungahlaziywa, futhi ukwelashwa okuhlukile kungasetshenziswa ukwandisa umuzwa wendawo ezungezile. Umsebenzi wokudlulisa ohlobene nekhanda. Uhlelo lokuzwa lomuntu lukhiqiza ama-spectrum ahlukene emisindo evela eziqondisweni ezahlukene, futhi lesi sici se-spectrum singachazwa ngumsebenzi wokudlulisa ohlobene nekhanda (HRT). Ngamafuphi, ukuma kwendawo kwendlebe yomuntu kufaka izinkomba ezintathu: okuvundlile, okuqondile, kanye nangaphambili nangemuva.

Ukuma okuvundlile kuncike kakhulu ezindlebeni, ukuma okuqondile kuncike kakhulu egobolondweni lendlebe, kanti ukuma kwangaphambili nangemuva kanye nokubona kwensimu yomsindo ozungezile kuncike kumsebenzi we-HRTF. Ngokusekelwe kule miphumela, i-Virtual Dolby surround ngokwenziwa idala isimo esifanayo samagagasi omsindo njengomthombo wangempela womsindo endlebeni yomuntu, okuvumela ubuchopho bomuntu ukuthi bukhiqize izithombe zomsindo ezihambisanayo endaweni efanele.