AIFF 转 Opus
把 AIFF 录音转成体积极小的 Opus 文件，很适合网页和即时通讯场景。
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AIFF
Apple's uncompressed audio format, the Mac counterpart to WAV. Full quality, large files, used in music production.
Opus
The most efficient audio codec available, built for the modern web. Excellent quality even at very low bitrates.