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.