CoreAudioType Constants

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Sample Type Constants

Constants used for specifying audio format flags


Indicates that an audio format can use any sample rate.

Audio Data Format Identifiers

Identifiers for audio data formats, used in the AudioStreamBasicDescription structure.

AudioStreamBasicDescription Flags

Standard flags for use in the mFormatFlags field of the AudioStreamBasicDescription structure.

AudioStreamBasicDescription Flag Combinations Constants

Commonly used combinations of data format flags for the AudioStreamBasicDescription structure.

MPEG-4 Audio Object Type Constants

Used in the mFormatFlags field of an AudioStreamBasicDescription structure that describes an MPEG-4 audio stream to specify the type of MPEG-4 audio data.

SMPTE Timecode Type Constants

SMPTE timecode types, used in the SMPTETime structure.

SMPTE State Flags

Flags that describe a SMPTE time state.

Audio Time Stamp Flags

These flags indicate the valid fields in an AudioTimeStamp structure.

Audio Time Stamp Flag Combination Constant

A commonly used combination of audio time stamp flags.

Audio Channel Label Constants

Channel labels for use in the mChannelLabel field of an AudioChannelDescription structure.

Channel Bitmap Constants

Channel bits for use in the mChannelBitmap field of an AudioChannelLayout structure.

Channel Coordinate Flags

Used in the mChannelFlags field of an AudioChannelDescription structure.


Indexes the fields of the mCoordinates array in an AudioChannelDescription structure.

Audio Channel Layout Tags

The identifiers for audio channel layouts.

Result Codes

This table lists result codes returned from the various C-based audio frameworks.


An unimplemented system function was called.


The file was not found.


An error in the parameter list of the function.


Not enough room in the heap zone.