Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 123]

Audio
CallbackRequest
ReportFinishedEvent
Gem
SystemBusInterface
SystemRequests
EngineRequests
ListenerRequest
SetWorldTransform
ObjectRequest
ExecuteTrigger
ExecuteSourceTrigger
PrepareTrigger
UnprepareTrigger
StopTrigger
StopAllTriggers
SetPosition
SetParameterValue
SetSwitchValue
SetEnvironmentValue
ResetEnvironments
ResetParameters
Release
SetMultiplePositions
SystemRequest
Initialize
Shutdown
ReserveObject
CreateSource
DestroySource
LoadControls
UnloadControls
LoadBank
UnloadBank
UnloadBanksByScope
ReloadAll
LoseFocus
GetFocus
MuteAll
UnmuteAll
StopAllAudio
DrawDebug
ChangeLanguage
SetPanningMode
IATLAudioObjectData
IATLListenerData
IATLTriggerImplData
IATLRtpcImplData
IATLSwitchStateImplData
IATLEnvironmentImplData
IATLEventData
IATLAudioFileEntryData
SATLSourceData
SATLAudioFileEntryInfo
SAudioImplMemoryInfo
AudioImplMemoryPoolInfo	This is used to pass information about an audio middleware's detailed memory pool usage
AudioSystemAllocator
AudioImplAllocator
AudioBankAllocator
ScopedXmlLoader
RingBufferBase
RingBuffer
SATLWorldPosition
MultiPositionParams
SAudioInputConfig
AudioStreamData
AudioStreamMultiTrackData
SAudioSourceInfo
TriggerNotificationIdType
AudioRequestBase
IAudioProxy
AudioPreloadNotifications
IAudioSystem
AudioTriggerNotifications
AudioStreamingRequests
AudioSystemImplementationNotifications
AudioSystemImplementationRequests
AudioSystemImplementation
MicrophoneRequests
NullAudioProxy
NullAudioSystem
CAudioTranslationLayer
SATLTriggerImplState
SATLTriggerInstanceState
CATLAudioObjectBase
CStateDebugDrawData
CATLGlobalAudioObject
AudioRaycastRequest
AudioRaycastResult
AudioRaycastRequests
AudioRaycastNotifications
RaycastInfo
RaycastProcessor
CATLAudioObject
AudioObjectIDFactory
CAudioEventManager
AudioRaycastManager
CAudioObjectManager
CAudioListenerManager
CATLXmlProcessor
SATLSharedData
CATLEntity
SATLSoundPropagationData
CATLListenerObject
CATLControlImpl
CATLTriggerImpl
CATLTrigger
CATLRtpcImpl
CATLRtpc
CATLSwitchStateImpl
CATLSwitchState
CATLSwitch
CATLEnvironmentImpl
CATLAudioEnvironment
CATLEvent
CATLAudioFileEntry
CATLPreloadRequest
SATLSwitchStateImplData_internal
CATLDebugNameStore
CInstanceManager
CSmoothFloat
Flags
CAudioProxy
CAudioThread
CAudioSystem
AudioFileCacheManagerNotifications
CFileCacheManager
AudioControls
IAudioConnection
IAudioSystemControl
SControlDef
IAudioSystemEditor
SControlScope
IATLControlModelListener
CATLControlsModel
CATLControlsPanel
QFilterButton
ATLControlsDialog
SRawConnectionData
CATLControl
IUndoControlOperation
CUndoControlAdd
CUndoControlRemove
IUndoFolderOperation
CUndoFolderRemove
CUndoFolderAdd
CUndoFolderRename
CUndoControlModified
CUndoItemMove
CAudioControlsEditorWindow
CAudioControlsLoader
SLibraryScope
CAudioControlsWriter
AudioControlSelectorHandler
CAudioSystemPanel
CInspectorPanel
QATLTreeModel
QConnectionsWidget
QSimpleAudioControlListWidget
AudioControlsEditor
EditorImplPluginEvents
AudioSystemGem
AudioSystemGemSystemComponent
AZStd
hash< Audio::TriggerNotificationIdType >
CAudioControlsEditorPlugin
CImplementationManager
ITreeWidgetItemFilter
QAudioControlItem
QAudioControlSortProxy
QAudioControlsTreeView
QConnectionListWidget
QFolderItem
QTreeWidgetFilter
SHideConnectedFilter
SImplNameFilter
SImplTypeFilter