AIFF 转 AAC
把不压缩的 AIFF 音频压缩成高效的 AAC，供手机和流媒体使用。
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AIFF
Apple's uncompressed audio format, the Mac counterpart to WAV. Full quality, large files, used in music production.
AAC
Raw AAC audio — MP3's successor, used in streaming and broadcasting. Efficient, but fewer apps open bare AAC files.