---
title: Audio Metadata Attribute Keys
framework: coreservices
role: collectionGroup
role_heading: API Collection
path: coreservices/file_metadata/mditem/audio_metadata_attribute_keys
---

# Audio Metadata Attribute Keys

Metadata attribute keys that describe an audio file.

## Topics

### Constants

- [kMDItemAppleLoopDescriptors](coreservices/kmditemappleloopdescriptors.md)
- [kMDItemAppleLoopsKeyFilterType](coreservices/kmditemappleloopskeyfiltertype.md)
- [kMDItemAppleLoopsLoopMode](coreservices/kmditemappleloopsloopmode.md)
- [kMDItemAppleLoopsRootKey](coreservices/kmditemappleloopsrootkey.md)
- [kMDItemAudioChannelCount](coreservices/kmditemaudiochannelcount.md)
- [kMDItemAudioEncodingApplication](coreservices/kmditemaudioencodingapplication.md)
- [kMDItemAudioSampleRate](coreservices/kmditemaudiosamplerate.md)
- [kMDItemAudioTrackNumber](coreservices/kmditemaudiotracknumber.md)
- [kMDItemComposer](coreservices/kmditemcomposer.md)
- [kMDItemIsGeneralMIDISequence](coreservices/kmditemisgeneralmidisequence.md)
- [kMDItemKeySignature](coreservices/kmditemkeysignature.md)
- [kMDItemLyricist](coreservices/kmditemlyricist.md)
- [kMDItemMusicalGenre](coreservices/kmditemmusicalgenre.md)
- [kMDItemMusicalInstrumentCategory](coreservices/kmditemmusicalinstrumentcategory.md)
- [kMDItemMusicalInstrumentName](coreservices/kmditemmusicalinstrumentname.md)
- [kMDItemRecordingDate](coreservices/kmditemrecordingdate.md)
- [kMDItemRecordingYear](coreservices/kmditemrecordingyear.md)
- [kMDItemTempo](coreservices/kmditemtempo.md)
- [kMDItemTimeSignature](coreservices/kmditemtimesignature.md)