Sinthani WAV ku AMR

Ena, ndipo ndi nthawi yayitali - ichi ndi chiwongola dzanja chomwe chimabweretsa zambiri. WAV imakhala ndi chilichonse chosadziwika bwino; AMR imachotsa zomwe psychoacoustic model imayembekezera kuti simudzawona. Pa 192 kbps ndi pamwambapa kuti kuyembekezera ndi kokwanira kuti zikhale zowoneka bwino pazinthu zambiri ndi zida zambiri. Tengani WAV ngati mtsogoleri wanu, chifukwa simungathe kubwerera ku AMR. WAV nthawi zambiri amasunga raw uncompressed PCM - aliyense sample anatenga moyenera, pa zimene bit kuwala ndi sampling rate anathawa. AMR ndi narrowband mawu codec kuyendetsa pakati pa 4.75 ndi 12.2 kbps, modeling munthu woimba m'mimba kuposa wonse audio spectrum.

Idzaikidwa pansi pa stereo, chifukwa AMR siyimakhala ndi njira yogwiritsira ntchito ma channel ambiri. Kulowetsa kumagwiritsa ntchito ma coefficients ovomerezeka kuti ma channel apakati azikhala owoneka bwino ndipo ma surrounds amaphatikizidwa pamalingaliro otsika. Chomwecho chilichonse chomwe chimadalirika pa malo osiyana a ma channel chimapita pamene ichi chikuchitika. AMR amawononga nyimbo: yake 8 kHz bandwidth amachotsa zonse pamwamba foni ma frequencies, ndi palibe ndalama ya re-encoding amabweretsa izo kumbuyo.

Chifukwa chimodzi mwazigawo zake ndi codec ya mawu kuposa codec ya nyimbo. Imakhala ndi maonekedwe a munthu woimba ndipo imachotsa chilichonse m’mbali mwa bandwidth ya foni, chomwe ndi choyenera kwa mawu olemba mawu komanso chowononga kwa chilichonse chomwe chili ndi zida. Kusintha kuchokera ku izo sikungabwezeretse ma frequencies osakhudzidwa — iwo sanali kusinthidwa pamalo oyamba. WAV ndi lalikulu - pafupifupi 10 MB pa stereo mphindi pa CD quality - ndi classic mtundu ali 4 GB chipinda ndi palibe malo kwa ma tag bwino.

Maakaunti aulere amafika pa 100 MB pa fayilo, ndipo WAV mabungwe amagwira ntchito kwambiri chifukwa mtunduwo umabweretsa ndalama zochuluka pazinthu zowonjezera pavidiyo. Premium imatulutsa katundu kwambiri. Ngati fayilo igawidwa m'magawo owerengeka chifukwa cha mtundu wamtundu, tsitsani limodzi ndipo amachitidwa ngati ntchito imodzi.

Default ndi 192 kbps kwa lossy AMR; pass-through kwa lossless AMR. Kusintha kwa 320 kbps kwa audiophile kapena 64-96 kbps kwa mawu olankhula audiobooks (owoneka bwino kwa mawu, amadula kukula kwa fayilo).

Ngati WAV ndi lossy ndipo AMR ndi lossless (mwachitsanzo MP3 → WAV), fayilo ya AMR si yabwino kuposa WAV - simungathe kubwezeretsa zambiri zomwe zatulutsidwa. Ngati WAV ndi lossless ndipo AMR ndi lossy, yembekezerani kuti codec ya AMR ibwezeretse; pa 192 kbps izi ndi zosawoneka bwino kwa zinthu zambiri.

Ndikoyenera - dzina, woimba, album, chaka, mndandanda wa nyimbo, album art, ndi masamba olemba (ofunika kwambiri kwa audiobooks) amawerengedwa kuchokera ku WAV ndipo amalemba mu AMR wokhala ndi AMR mtundu umathandizira ma tag. M4B audiobook structure round-trips into M4B and AAX → M4B output.

Yai - chotsani fayilo ya WAV ndikuwapanga mofanana. Premium ili ndi ogwira ntchito ambiri mofanana ndi malire a fayilo, kotero fayilo ya 500-file batch imatha m'maola angapo osati m'maola angapo.

Mwachidule ndi yemweyo (48 kHz WAV → 48 kHz AMR). Ngati mukufuna kuchepetsa kusamvana kwa kugwirizana (mwachitsanzo 96 kHz → 44.1 kHz kwa kulemba CD) kusankha kwa kusamvana kwamphamvu kumachita izi ndi kusamvana kwabwino.

Ndiye — njira yosintha mawu imagwiritsa ntchito ITU-R BS.1770 / EBU R128 yosintha mawu ku AMR, yolenga -14 LUFS (mtengo wosinthira), -16 LUFS (mtengo wosinthira podcast), kapena -23 LUFS (mtengo wosinthira audiobook).

MP3 amasewera padziko lonse. AAC amasewera pa Apple, ambiri Android, Sonos. FLAC amasewera pa Sonos ndi Android, osachepera bwino pa zaka zakale iPods. M4B audiobooks kusewera ndi bokosi la navigation pa iOS Buku, Audiobookshelf, ndi Smart Audiobook Player.