M4A (MPEG-4 Audio)
M4A adalah ekstensi file audio untuk wadah MPEG-4 Part 14 yang berisi audio AAC atau Apple Lossless (ALAC). Format ini adalah format audio pilihan Apple dan digunakan oleh iTunes, Apple Music, dan iOS untuk musik yang dibeli dan dirip.
Tipe MIME
audio/mp4
Tipe
Biner
Kompresi
Lossy
Kelebihan
- + Better audio quality than MP3 at equivalent file sizes
- + Native support on Apple devices, iTunes, and most modern players
- + Supports both lossy (AAC) and lossless (ALAC) codecs
- + Rich metadata with album art, chapters, and lyrics
Kekurangan
- โ Less universal than MP3 for older devices and car stereos
- โ AAC encoding has licensing considerations
- โ Some Android and Linux players require codec installation
Kapan Menggunakan .M4A
Gunakan M4A untuk musik di ekosistem Apple dan saat kualitas lebih baik dari MP3 pada bitrate yang sama diinginkan.
Detail Teknis
File M4A menggunakan wadah ISO Base Media File Format (ISOBMFF / MP4). Audio biasanya dienkode AAC-LC. Varian ALAC menyediakan kompresi lossless. Wadah ini mendukung bab, metadata, dan gambar album.
Riwayat
Apple mengadopsi ekstensi .m4a untuk membedakan file MPEG-4 khusus audio dari file video .mp4. iTunes Store diluncurkan dengan file .m4p berproteksi DRM pada tahun 2003 dan beralih ke .m4a bebas DRM pada tahun 2009.
Konversi dari .M4A
Konversi ke .M4A
Format Terkait
Istilah Terkait
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