Enumeration

Audio Channel Layout Tags

The identifiers for audio channel layouts.

Declaration

enum : AudioChannelLayoutTag {
    ...
};

Overview

These identifiers specify the channels included in a layout and specify the particular ordering of those channels. Used in the mChannelLayoutTag field of an AudioChannelLayout structure.

Topics

General Layouts

kAudioChannelLayoutTag_UseChannelDescriptions

An array of audio channel description structures that defines the layout mapping.

kAudioChannelLayoutTag_UseChannelBitmap

A bitmap that defines the layout mapping.

kAudioChannelLayoutTag_Mono

A standard monophonic stream.

kAudioChannelLayoutTag_Stereo

A standard stereophonic stream.

kAudioChannelLayoutTag_StereoHeadphones

A standard stereo stream; headphone playback implied.

kAudioChannelLayoutTag_MatrixStereo

A matrix-encoded stereo stream.

kAudioChannelLayoutTag_MidSide

A middle and side channel audio layout.

kAudioChannelLayoutTag_XY

A coincident, angled microphone pair.

kAudioChannelLayoutTag_Binaural

A binaural stereo audio layout.

kAudioChannelLayoutTag_Ambisonic_B_Format

An ambisonic B-format audio layout.

kAudioChannelLayoutTag_Quadraphonic

A quadraphonic audio layout.

kAudioChannelLayoutTag_Pentagonal

A pentalgonal audio layout.

kAudioChannelLayoutTag_Hexagonal

A hexagonal audio layout.

kAudioChannelLayoutTag_Octagonal

An octagonal audio layout.

kAudioChannelLayoutTag_Cube

A cubic audio layout.

MPEG Defined Layouts

kAudioChannelLayoutTag_MPEG_1_0

An MPEG 1-channel audio layout.

kAudioChannelLayoutTag_MPEG_2_0

An MPEG 2-channel audio layout.

kAudioChannelLayoutTag_MPEG_3_0_A

An MPEG 3-channel, configuration A, audio layout.

kAudioChannelLayoutTag_MPEG_3_0_B

An MPEG 3-channel, configuration B, audio layout.

kAudioChannelLayoutTag_MPEG_4_0_A

An MPEG 4-channel, configuration A, audio layout.

kAudioChannelLayoutTag_MPEG_4_0_B

An MPEG 4-channel, configuration B, audio layout

kAudioChannelLayoutTag_MPEG_5_0_A

An MPEG 5-channel, configuration A, audio layout.

kAudioChannelLayoutTag_MPEG_5_0_B

An MPEG 5-channel, configuration B, audio layout.

kAudioChannelLayoutTag_MPEG_5_0_C

An MPEG 5-channel, configuration C, audio layout.

kAudioChannelLayoutTag_MPEG_5_0_D

An MPEG 5-channel, configuration D, audio layout.

kAudioChannelLayoutTag_MPEG_5_1_A

An MPEG 5.1-channel, configuration A, audio layout.

kAudioChannelLayoutTag_MPEG_5_1_B

An MPEG 5.1-channel, configuration B, audio layout.

kAudioChannelLayoutTag_MPEG_5_1_C

An MPEG 5.1-channel, configuration C, audio layout.

kAudioChannelLayoutTag_MPEG_5_1_D

An MPEG 5.1-channel, configuration D, audio layout.

kAudioChannelLayoutTag_MPEG_6_1_A

An MPEG 6.1-channel, configuration A, audio layout.

kAudioChannelLayoutTag_MPEG_7_1_A

An MPEG 7.1-channel, configuration A, audio layout.

kAudioChannelLayoutTag_MPEG_7_1_B

An MPEG 7.1-channel, configuration B, audio layout.

kAudioChannelLayoutTag_MPEG_7_1_C

An MPEG 7.1-channel, configuration C, audio layout.

kAudioChannelLayoutTag_Emagic_Default_7_1

An Emagic 7.1-channel default audio layout.

kAudioChannelLayoutTag_SMPTE_DTV

An SMPTE DTV audio layout.

ITU Defined Layouts

kAudioChannelLayoutTag_ITU_1_0

An ITU 1-channel audio layout.

kAudioChannelLayoutTag_ITU_2_0

An ITU 2-channel audio layout.

kAudioChannelLayoutTag_ITU_2_1

An ITU 2.1-channel audio layout.

kAudioChannelLayoutTag_ITU_2_2

An ITU 2.2-channel audio layout.

kAudioChannelLayoutTag_ITU_3_0

An ITU 3-channel audio layout.

kAudioChannelLayoutTag_ITU_3_1

An ITU 3.1-channel audio layout.

kAudioChannelLayoutTag_ITU_3_2

An ITU 3.2-channel audio layout.

kAudioChannelLayoutTag_ITU_3_2_1

An ITU 3.2.1-channel audio layout.

kAudioChannelLayoutTag_ITU_3_4_1

An ITU 3.4.1-channel audio layout.

DVD Defined Layouts

kAudioChannelLayoutTag_DVD_0

A DVD monaural audio layout.

kAudioChannelLayoutTag_DVD_1

A DVD stereo audio layout.

kAudioChannelLayoutTag_DVD_2

A DVD 3-channel audio layout.

kAudioChannelLayoutTag_DVD_3

A DVD 4-channel audio layout.

kAudioChannelLayoutTag_DVD_4

A DVD 2.1-channel audio layout.

kAudioChannelLayoutTag_DVD_5

A DVD 3.1-channel audio layout.

kAudioChannelLayoutTag_DVD_6

A DVD 4.1-channel audio layout.

kAudioChannelLayoutTag_DVD_7

A DVD 3-channel audio layout.

kAudioChannelLayoutTag_DVD_8

A DVD 4-channel audio layout.

kAudioChannelLayoutTag_DVD_9

A DVD 5-channel audio layout.

kAudioChannelLayoutTag_DVD_10

A DVD 3.1-channel audio layout.

kAudioChannelLayoutTag_DVD_11

A DVD 4.1-channel audio layout.

kAudioChannelLayoutTag_DVD_12

A DVD 5.1-channel audio layout.

kAudioChannelLayoutTag_DVD_13

A DVD 4-channel audio layout.

kAudioChannelLayoutTag_DVD_14

A DVD 5-channel audio layout.

kAudioChannelLayoutTag_DVD_15

A DVD 3.1-channel audio layout.

kAudioChannelLayoutTag_DVD_16

A DVD 4.1-channel audio layout.

kAudioChannelLayoutTag_DVD_17

A DVD 5.1-channel audio layout.

kAudioChannelLayoutTag_DVD_18

A DVD 4.1-channel audio layout.

kAudioChannelLayoutTag_DVD_19

A DVD 5-channel audio layout.

kAudioChannelLayoutTag_DVD_20

A DVD 5.1-channel audio layout.

Symmetrical Layouts

kAudioChannelLayoutTag_AudioUnit_4

A quadraphonic symmetrical layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_5

A pentagonal symmetrical layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_6

A hexagonal symmetrical layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_8

An octagonal symmetrical layout, recommended for use by audio units.

Surround Based Layouts

kAudioChannelLayoutTag_AudioUnit_5_0

A 5-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_6_0

A 6-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_7_0

A 7-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_7_0_Front

An alternate 7-channel surround-based layout, for use by audio units.

kAudioChannelLayoutTag_AudioUnit_5_1

A 5.1-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_6_1

A 6.1-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_7_1

A 7.1-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_AudioUnit_7_1_Front

A 7.1-channel surround-based layout, recommended for use by audio units.

kAudioChannelLayoutTag_TMH_10_2_std

A TMH 10.2 multiple-channel surround-based layout .

kAudioChannelLayoutTag_TMH_10_2_full

An extended TMH 10.2 multiple-channel surround-based layout, recommended for use by audio units.

AAC Defined Layouts

kAudioChannelLayoutTag_AAC_3_0

An AAC 3-channel audio layout.

kAudioChannelLayoutTag_AAC_Quadraphonic

An AAC quadraphonic surround-based layout.

kAudioChannelLayoutTag_AAC_4_0

An AAC 4-channel surround-based layout.

kAudioChannelLayoutTag_AAC_5_0

An AAC 5-channel surround-based layout.

kAudioChannelLayoutTag_AAC_5_1

An AAC 5.1-channel surround-based layout.

kAudioChannelLayoutTag_AAC_6_0

An AAC 6-channel surround-based layout.

kAudioChannelLayoutTag_AAC_6_1

An AAC 6.1-channel surround-based layout.

kAudioChannelLayoutTag_AAC_7_0

An AAC 7-channel surround-based layout.

kAudioChannelLayoutTag_AAC_7_1

An AAC 7.1-channel surround-based layout.

kAudioChannelLayoutTag_AAC_7_1_B

An AAC 7.1-channel, configuration B, surround-based layout.

kAudioChannelLayoutTag_AAC_7_1_C

An AAC 7.1-channel, configuration C, surround-based layout.

kAudioChannelLayoutTag_AAC_Octagonal

An AAC 8-channel surround-based layout.

EAC3 Defined Layouts

kAudioChannelLayoutTag_EAC_6_0_A

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC_7_0_A

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_6_1_A

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_6_1_B

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_6_1_C

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_A

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_B

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_C

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_D

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_E

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_F

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_G

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

kAudioChannelLayoutTag_EAC3_7_1_H

A Blu-ray Disc audio layout for Enhanced AC-3, also known as Dolby Digital Plus.

DTS Defined Layouts

kAudioChannelLayoutTag_DTS_3_1

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_4_1

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_0_A

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_0_B

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_0_C

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_1_A

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_1_B

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_1_C

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_6_1_D

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_7_0

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_7_1

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_8_0_A

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_8_0_B

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_8_1_A

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

kAudioChannelLayoutTag_DTS_8_1_B

A Blu-ray Disc audio layout, defined by DTS (Digital Theater Systems Ltd.).

HOA Defined Layouts

kAudioChannelLayoutTag_HOA_ACN_N3D

A Higher-order Ambisonics, full 3D normalization audio layout.

kAudioChannelLayoutTag_HOA_ACN_SN3D

A Higher-order Ambisonics, Schmidt semi-normalization audio layout.

General Information Tags

kAudioChannelLayoutTag_DiscreteInOrder

A tag used to map input channels to output channels without changing the channel order.

kAudioChannelLayoutTag_Unknown

The channel layout is unknown.

Reserved Tag Range

The tags in this section define a range of values reserved for future Apple use. Do not create tags in this range.

kAudioChannelLayoutTag_BeginReserved

The beginning value for a reserved range of layout tags.

kAudioChannelLayoutTag_EndReserved

The ending value for a reserved range of layout tags.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software