Convert to UTF-16 flac and wav for Spotify

[ohrenkino]

@KameHameHAAA

ID3v2.3 UTF-16

Please note that the encoding settings only apply to mp files.
Flac files get tags encoded in UTF-8
See here:

Encoding "foreign" character metadata (FLAC files)

Using Windows 10 and mp3tag for adding metadata to FLAC files. Since my keyboard does not directly support foreign characters, such as those found in Celtic music and other non-USA English music forms, I've been using Character Map to add them. However, it turns out that these characters are not necessarily UTF-8 compliant. This causes problems for us in ways too complicated to explain here. That said, how can (or should) Character Map be used to properly insert UTF-8 compliant characters that…

BTW: the tag encoding has nothing to do with the filenames.