Sinthani AIFF ku AMR

Ena, ndipo ndi nthawi yayitali - ichi ndi chiwongola dzanja chomwe chimabweretsa zambiri. AIFF 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 AIFF ngati mtsogoleri wanu, chifukwa simungathe kubwerera ku AMR. AIFF amasunga PCM yosasinthika ya big-end — yomwe ndi yofanana ndi WAV ya Apple, ndi kusamvana kwa bit-by-bit. AMR ndi narrowband mawu codec kuyendetsa pakati pa 4.75 ndi 12.2 kbps, modeling munthu woimba m'mimba kuposa wonse audio spectrum.

Siyimagwira ntchito. AIFF imathamanga ndi metadata block yoyenera, koma AMR siyimagwira ntchito yoyenera ya woimba, album, track number kapena cover art, kotero ma tag amatulutsidwa osati kuwonongedwa. Tengani AIFF ngati kopita kokhala ndi tag, kapena gwiritsani ntchito njira zina monga Mp3tag kapena MusicBrainz Picard. AMR amawononga nyimbo: yake 8 kHz bandwidth amachotsa zonse pamwamba foni ma frequencies, ndi palibe ndalama ya re-encoding amabweretsa izo kumbuyo.

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.

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. AIFF ndi lalikulu monga WAV ndi zoipa thandizo kunja kwa Apple padziko, kotero ndi woipa kusankha kwa kugawa.

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 AIFF ndi lossy ndipo AMR ndi lossless (mwachitsanzo MP3 → WAV), fayilo ya AMR si yabwino kuposa AIFF - simungathe kubwezeretsa zambiri zomwe zatulutsidwa. Ngati AIFF 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 AIFF 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 AIFF 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 AIFF → 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.