The set-top boxes also support Dolby Digital 5.1 surround sound, which is currently broadcast on some HD channels and video on demand (VOD) content.
ðə sˈɛttˈɑːp bˈɑːksᵻz ˈɔːlsoʊ səpˈoːɹt dˈoʊlbi dˈɪdʒɪɾəl fˈaɪv.wˈʌn sɚɹˈaʊnd sˈaʊnd, wˌɪtʃ ɪz kˈɜːɹəntli bɹˈɔːdkæst ˌɔn sˌʌm ˌeɪtʃdˈiː tʃˈænəlz ænd vˈɪdɪoʊ ˌɔn dᵻmˈænd vˌiːˌoʊdˈiː kˈɑːntɛnt.