Audio → Audio
AIFFtoAAC
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Video, audio, images and documents: MP4, MP3, HEIC, DOCX, PDF and 33 more formats. Several files or a link at once.
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Why convert
AIFF — Apple's uncompressed audio, the Mac counterpart of WAV. AAC — an audio codec that sounds cleaner than MP3 at the same bitrate.
What changes in the file
Lossy compression removes part of the sound; at 256–320 kbit/s it is barely audible.
Which settings to pick
Use 192–256 kbit/s for music; 96 is enough for speech.