
uda-4

1974 madhye nippon kolambiyane (denon) sadar keleli yu. dii.-4 hii phonograph nondisathi eka swatantra chaar-vahini quadraphonic dhwani pranali hotee. 1972 madhye jeey. vhee. see. aanee aar. see. aii. neey suru kelelya adhik yashasvi see. dii.-4 prakriyeshi yaa pranaliche kahee samya hote. 
yaa swarupat keval 35 teey 40 ell. pii. chya albumchi shirshake encode kelee gelee hotee aanee tee keval britton, europe aanee japanmadhye vikali gelee hotee. yapaiki bahutansh prakashne denon lebaldware vikali gelee. 
yu. dii.-4 sathee vaparlya jaanarya yu. emm. ex. (sarvatrik matricks) mankamadhye done upapranali aaheth
yu. dii.-4 prakriyene bii. emm. ex. aanee kyu. emm. ex. yaa donhi goshtinche ekach nondit niyaman kele. asha prakare, vidyaman styrio reecord playercha vapar karoon chaturbhuj dhwani decode karnyasathi bmx decodercha vapar keela jaau shakato, tarr vishesh phono kadatus aanee vishesh yoodi-4 demodulator vaparoon swatantra purak qmx vahinya kadhali jaau shakatat (dishatmak resolution vadhavane). 
saiddhantikdrushtya yamule vidyaman kheladu aanee nondi yanchyashi magas susangatata shakya jhaali, parantu davya aanee ujavya vahinyanmadhil tappyatil farkanmule pranalila niyamit styrio playbackshee visangati hotee.
yuu. dii.-4 playbacksathi phono kadatusechi vyavastha see. dii.-4 peksha qamee mahattvachi hotee, kaaran uchch varanvarta vahak sanket see. dii.-4 pranalimadhye aadhalanaya signalaitke uchch navhate.