MP3をM4Aに変換
MP3をM4Aファイルに変換すれば、Apple MusicやiTunes、iPhoneのライブラリにすっと収まります。
変換元
To
MP3
The universal audio format. Small files that play on every device, app, and player made in the last two decades.
M4A
The AAC audio container used by Apple Music and iTunes. Better quality than MP3 at the same size.