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# AVAudioSequencer.InfoDictionaryKey

Constants that defines metadata keys for a sequencer.

```
struct InfoDictionaryKey
```

## Topics

### Getting Album Details

[`album`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/album)

A key that represents the album.

[`artist`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/artist)

A key that represents the artist.

[`comments`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/comments)

A key that represents the comments.

[`composer`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/composer)

A key that represents the composer.

[`copyright`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/copyright)

A key that represents the copyright statement.

[`genre`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/genre)

A key that represents the genre.

[`lyricist`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/lyricist)

A key that represents the lyricist.

[`title`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/title)

A key that represents the title.

[`trackNumber`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/trackNumber)

A key that represents the track number.

[`subTitle`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/subTitle)

A key that represents the subtitle.

[`year`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/year)

A key that represents the year.

### Getting the Duration and Time

[`approximateDurationInSeconds`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/approximateDurationInSeconds)

A key that represents the approximate duration.

[`timeSignature`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/timeSignature)

A key that represents the time signature.

[`tempo`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/tempo)

A key that represents the tempo.

### Getting the Recording Date

[`recordedDate`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/recordedDate)

A key that represents the date of the recording.

### Getting Encoding Information

[`encodingApplication`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/encodingApplication)

A key that represents the encoding application.

[`sourceEncoder`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/sourceEncoder)

A key that represents the encoder the source uses.

[`nominalBitRate`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/nominalBitRate)

A key that represents the nominal bit rate.

[`sourceBitDepth`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/sourceBitDepth)

A key that represents the bit depth of the source.

[`keySignature`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/keySignature)

A key that represents the key signature.

### Getting the Channel Layout

[`channelLayout`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/channelLayout)

A key that represents the channel layout.

### Getting the Recording Code

[`ISRC`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/ISRC)

A key that represents the international standard recording code.

### Creating a Dictionary Key

[`init(rawValue:)`](/documentation/AVFAudio/AVAudioSequencer/InfoDictionaryKey/init(rawValue:))

Creates a new instance with the raw value you specify.


---

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