wp-includes/ID3/getid3.lib.php:965ISO-8859-1 => UTF-16LE (BOM)
$stringstringstring public static function iconv_fallback_iso88591_utf16($string) { return self::iconv_fallback_iso88591_utf16le($string, true); }Unchanged from 6.7.7 through 7.1.0.
Signature, return type and hooks compared across 5 parsed releases.
src/wp-includes/ID3/getid3.lib.php, and regenerated for each WordPress release so it tracks the code rather than a snapshot of it.