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Roller posted a topic in Poweramp v2 Discussion (Legacy Version)ID3v2 standard for multiple tags is to use null bytes (\0) as separators to split ID3 tags in multiple values. See Wikipedia The null byte is the C string terminator. Therefore standard programs are using only the first value. Extended programs show all values as multiple tags. Poweramp supports '/' and ';' as separators which worked very well, but these separatores are only supported by a few programs. All other programs are using wrong genre names "genre1;genre2;genre3". Null bytes are a much better choice because programs never present wrong genres names, they will only use the first genre skipping the others. If ID3-tag is separated by null bytes (genre1\0genre2\0genre3) then Poweramp concatenates these multiple values with colons to a single value "genre1:genre2:genre3". The standard separators \0 are completely ignored and overwritten by colons. This is a bug. BTW: Mp3tag is using null bytes if genre is separated by two backslashs: genre1\\genre2\\genre3. These genres are handled as separate tags.