Apple Lossless conversion
I noticed the other day that there is now an option within the context menu in iTunes to "Create Apple Lossless Version". I was wondering if this actually created a higher sound quality track or just expanded the file to lossless size with the same quality. I would think that you wouldn't be able to upscale music already encoded in .mp3 or AAC because there is lost data. Then I thought that because it's a predictable algorithm to encode in any format, why couldn't the lost data be predicted and replaced? Also, why even have that option if it's not really going to do anything but expand files without providing a high sound quality?