M4AをFLACに変換
M4A音声をFLACに変換すれば、オープンな形式のまま可逆音質で保存できます。
変換元
To
M4A
The AAC audio container used by Apple Music and iTunes. Better quality than MP3 at the same size.
FLAC
Lossless compressed audio — CD quality at roughly half the size of WAV. The archival format of choice for music collections.