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

ALBuffer	A buffer for audio data that will be played via a SoundSource
ALCaptureDevice	UNIMPLEMENTED FOR IOS An OpenAL device for capturing sound data
ALChannelSource	A Sound source composed of other sources
ALContext	A context encompasses a single listener and a series of sources
ALDevice	A device is a logical mapping to an audio device through the OpenAL implementation
ALListener	The listener represents the user who is listening to sounds in 3D space
ALOrientation	Represents an orientation, consisting of an "at" vector (representing the "forward" direction), and the "up" vector (representing "up" for the subject)
ALPoint	Represents a 3-dimensional point for certain ObjectAL properties
<ALSoundSource>	Manages all properties relating to an OpenAL sound source
ALSoundSourcePool	A pool of sound sources, which can be fetched based on availability
ALSource	A source represents an object that emits sound which can be heard by a listener
ALVector	Represents a 3-dimensional vector for certain ObjectAL properties
ALWrapper	A thin wrapper around the C OpenAL API, with a few convenience methods thrown in
IOSVersion	Reports the version of iOS being run on the current device
OALAction	Represents an action that can be performed on an object
OALActionManager	Manages all ObjectAL actions
OALAudioFile	Maintains an open audio file and allows loading data from that file into new ALBuffer objects
OALAudioSession	Handles the audio session and interrupts
OALAudioTrack	Plays an audio track via AVAudioPlayer
OALAudioTracks	Keeps track of all AudioTrack objects
OALCallAction	Calls a selector on a target
OALConcurrentActions	A set of actions that get run concurrently
OALExponentialFunction	Changes slowly at the start, and quickly at the end
<OALFunction>	A function takes a value from 0.0 to 1.0 and returns another value from 0.0 to 1.0
OALFunctionAction	An action that applies a function to the proportionComplete parameter in [update] before applying the result to the target
OALGainAction	A function-based action that modifies the target's gain
OALLinearFunction	Function that changes at a constant rate
OALLogarithmicFunction	Changes quickly at the start, and slowly at the end
OALMoveByAction	Moves the target from its current position by the specified delta over time in 3D space
OALMoveToAction	Moves the target from its current position to the specified position over time in 3D space
OALPanAction	A function-based action that modifies the target's pan
OALPitchAction	A function-based action that modifies the target's pitch
OALPlaceAction	Places the target at the specified position
OALReverseFunction	Returns the reverse of another function
OALSCurveFunction	Changes slowly at the start, quickly at the midpoint, then slowly again at the end
OALSequentialActions	A set of actions that get run in sequence
OALSimpleAudio	A simpler interface to the ObjectAL sound library
OALSuspendHandler	Provides two controls (interrupted and manuallySuspended) for suspending a slave object, and also propagates such control messages to interested listeners
<OALSuspendListener>	Allows an object to participate in interrupt and suspend operations
<OALSuspendManager>	A suspend manager is a listener that also allows other objects to subscribe to receive events as the manager receives them
OALTargetedAction	Ignores whatever target it was invoked upon and applies the specified action on the target specified at creation time
OALTools	Miscellaneous tools used by ObjectAL
ObjectAL
OpenALManager	Manager class for OpenAL objects (ObjectAL)