AACをOpusに変換
AAC音声をOpusに再エンコードすれば、同程度の音質を保ちながらさらにファイルサイズを縮小できます。
変換元
To
AAC
Raw AAC audio — MP3's successor, used in streaming and broadcasting. Efficient, but fewer apps open bare AAC files.
Opus
The most efficient audio codec available, built for the modern web. Excellent quality even at very low bitrates.