Does the transferred metadata include lyrics? In previous versions it was reported that those weren't included in files from Match along with other metadata.
Also, can audio files be excluded by changing them from Music to another type (like Audiobook or voice note)? I'm sure I'm not the only one with a bunch of files that have no reason to be included in Match.
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Unfortunately, I don't have any lyrics stored so, I can't tell if they are preserved. I would assume that they are preserved. There isn't a way to get a "pure" file without it being based on your existing meta-data, so Apple isn't going to replace or add info, but I don't think anything gets stripped. I do know that commends are preserved, which makes me think that lyrics would be if you have added them yourself.
Audiobooks are excluded, but not files that have Audiobooks as the genre, so if you convert them to a true audio book then it should be excluded, but then it will be in the books area.
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wont they need to wipe it again because of beta 3? the public release is probably farther away than if that is the case.
In iTunes it still reminds you that you are using a beta and that you should not delete any files from your computer that you want to retain, so I am almost certain that there will still be one more wipe before it goes live. So, we will probably get a few day's notice before it launches, which means it is at best a few days away, but more likely a week to ten days.