Convert MP3 files to AIFF using To WAV Converter:
- Open 'To WAV Converter.'
- Select the AIFF Audio Format in Preferences / Format
- In the Finder, select a few MP3 files or folders containing them.
- Drag files, selected in the Finder, and drop them into 'To WAV Converter.'
- Click on the links in the Progress Window to access new AIFF files.
Conversion of MP3 to AIFF with preserving the quality
The AIFF/PCM is a lossless format, while MP3 is not. So, if you convert MP3 to AIFF/PCM, you get whatever imperfections existed in the MP3, meaning the AIFF won't get better. However, it is possible to avoid getting it worse.
When converting a music MP3, the default settings would do just fine. That is, AIFF Codec set to 'Automatic Selection.' To preserve quality, it is also essential to avoid resampling and remixing. Sample Rate and Channels should be 'As Source.'