audio

type Codec int

type Metadata interface {
	Title() string         // The primary song title
	Album() string         // The album the song belongs to
	Artist() string        // The primary performer/artist of the song
	AlbumArtist() string   // The album artist
	Composer() string      // The composer of the song
	Year() int             // The release year of the song (not necessarily recording year)
	Genre() string         // The genre of the song
	Track() (int, int)     // The track number of the song, 0 for unknown
	Disc() (int, int)      // The disc number of the song, 0 for unknown
	Length() time.Duration // The length of the song in milliseconds
	Comment() string       // A comment
	Copyright() string     // Copyright notice, usually in the form YYYY Name
	Website() string       // Website of the performer

	EncodedBy() string       // Who encoded the audio
	EncoderSettings() string // Any specific encoder settings
	Encoding() Codec         // Codec returns the file codec, or Unknown.
	EncodingBitrate() int    // Bitrate returns the file bitrate in Kbps, or -1 if unknown.

	OriginalFilename() string // The original filename of the song
}