txt

const (
	// TagRelative is an indicator whether a song's music must be interpreted in relative mode.
	// If this tag is absent or not set to `"YES"` the song is interpreted in absolute mode.
	TagRelative = "RELATIVE"

	// TagEncoding is a known legacy tag that specifies the encoding of a txt file.
	// UltraStar and Vocaluxe only understand the values "CP1250" and "CP1252".
	// New songs should only use UTF-8 encoding.
	TagEncoding = "ENCODING"

	// TagMP3 references the audio file for a song.
	// The value is a file path relative to the TXT file.
	// The audio file may be in MP3 format but other formats are supported as well.
	// Specifically video files may also be used.
	//
	// This tag is not required but a without this tag a song has no audio.
	TagMP3 = "MP3"

	// TagVideo references the video file for a song.
	// The value is a file path relative to the TXT file.
	TagVideo = "VIDEO"

	// TagCover references the artwork file for a song.
	// The value is a file path relative to the TXT file.
	TagCover = "COVER"

	// TagBackground references the background image for a song.
	// The value is a file path relative to the TXT file.
	TagBackground = "BACKGROUND"

	// TagBPM identifies the starting BPM for a song.
	// In most cases this BPM value holds for the entire duration of a song but
	// Multi BPM songs are supported by UltraStar.
	// The actual BPM value is 4 times as high as the value stored in the TXT file.
	//
	// The value is a floating point number.
	TagBPM = "BPM"

	// TagGap identifies the number of milliseconds before beat 0 starts.
	// This is used as an offset for the entire lyrics.
	//
	// The value is a floating point number.
	TagGap = "GAP"

	// TagVideoGap identifies the number of seconds before the video starts.
	// In contrast to TagGap this is specified in seconds instead of milliseconds.
	//
	// The value is a floating point number.
	TagVideoGap = "VIDEOGAP"

	// TagNotesGap identifies an offset added to the beats of the Music.
	// This is used together with TagResolution.
	//
	// The value is an integer.
	TagNotesGap = "NOTESGAP"

	// TagStart specifies the number of seconds into a song where singing should start.
	// This can be used for testing or to skip long intros.
	//
	// The value is a floating point number.
	TagStart = "START"

	// TagEnd specifies the number of milliseconds into a song where singing should end.
	// This can be used for testing or to skip long outros.
	//
	// The value is an integer.
	TagEnd = "END"

	// TagResolution seems to be relevant only in XML formatted songs.
	// The exact purpose is unclear.
	//
	// The value is an integer.
	TagResolution = "RESOLUTION"

	// TagPreviewStart specifies the number of seconds into a song where the preview should start.
	//
	// The value is a floating point number.
	TagPreviewStart = "PREVIEWSTART"

	// TagMedleyStartBeat identifies the beat of the song where the medley starts.
	//
	// The value is an integer.
	TagMedleyStartBeat = "MEDLEYSTARTBEAT"

	// TagMedleyEndBeat identifies the beat of the song where the medley ends.
	//
	// The value is an integer.
	TagMedleyEndBeat = "MEDLEYENDBEAT"

	// TagCalcMedley can be set to "OFF" to disable the automatic medley and preview detection algorithms in UltraStar.
	// Other values are not supported.
	//
	// Manually setting medley start and end beat has the same effect.
	TagCalcMedley = "CALCMEDLEY"

	// TagTitle specifies the title/name of the song.
	TagTitle = "TITLE"

	// TagArtist specifies the artist of the song.
	TagArtist = "ARTIST"

	// TagGenre specifies the genre of the song.
	TagGenre = "GENRE"

	// TagEdition specifies the edition of the song.
	// The edition was originally intended as a way to categorize the original SingStar editions
	// but is often used as an arbitrary category value.
	TagEdition = "EDITION"

	// TagCreator identifies the creator of the song file.
	// This should be considered equal to TagAuthor.
	TagCreator = "CREATOR"

	// TagAuthor identifies the creator of the song file.
	// This should be considered equal to TagCreator.
	TagAuthor = "AUTHOR"

	// TagLanguage identifies the language of the song.
	// This does not have an impact on the song's lyrics but is only used as metadata for categorizing songs.
	TagLanguage = "LANGUAGE"

	// TagYear identifies the release year of the song.
	//
	// The value must be an integer.
	TagYear = "YEAR"

	// TagComment adds an arbitrary comment to a song.
	TagComment = "COMMENT"

	// TagDuetSingerP1 specifies the name of the first duet singer.
	// This tag should be considered equivalent to TagP1.
	TagDuetSingerP1 = "DUETSINGERP1"

	// TagDuetSingerP2 specifies the name of the second duet singer.
	// This tag should be considered equivalent to TagP2.
	TagDuetSingerP2 = "DUETSINGERP2"

	// TagP1 specifies the name of the first duet singer.
	// This tag should be considered equivalent to TagDuetSingerP1.
	TagP1 = "P1"

	// TagP2 specifies the name of the first duet singer.
	// This tag should be considered equivalent to TagDuetSingerP2.
	TagP2 = "P2"
)