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Going Universal: Audio Developers Catch the Wave
(HTML)
Learn how audio developers who built universal binaries of their applications are reaping the benefits.
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Articles |
2006-07-18
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The Sound of Opportunity Knocking: The Audio Units Community Takes Off
(HTML)
Learn how one developer created a successful business using audio units.
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Articles |
2005-10-31
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Turn up the Volume with Audio Units
(HTML)
Learn to build a sample volume unit, test it, and integrate it into GarageBand.
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Articles |
2005-01-31
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Audio Queue Services Programming Guide
(HTML)
(PDF)
Describes how to play and record audio using Audio Queue Services.
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Guides |
2007-10-31
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Audio Unit Programming Guide
(HTML)
(PDF)
Explains how to use Core Audio frameworks and the Core Audio SDK to create audio units.
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Guides |
2007-10-31
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Core Audio Overview
(HTML)
(PDF)
Provides an overview of Core Audio and its programming interfaces.
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Guides |
2007-01-08
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Core Audio Data Types Reference
(HTML)
(PDF)
Describes data types and constants used throughout Core Audio.
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Reference |
2008-11-19
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Audio File Stream Services Reference
(HTML)
(PDF)
Describes the interface for reading non-random access audio file streams.
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Reference |
2008-10-15
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Extended Audio File Services Reference
(HTML)
(PDF)
Describes an interface for reading and writing audio files with automatic format conversion.
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Reference |
2008-09-09
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Audio File Services Reference
(HTML)
(PDF)
Describes a C programming interface for reading and writing audio files.
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Reference |
2008-07-08
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Audio Queue Services Reference
(HTML)
(PDF)
Describes a high-level programming interface for recording and playing back audio data.
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Reference |
2008-07-08
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Core Audio Glossary
(HTML)
(PDF)
Defines general digital audio terms as well as terms specific to Apple's Core Audio technology.
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Reference |
2008-07-07
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Core MIDI Framework Reference
(HTML)
Describes a C API for Mac OS X MIDI system services.
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Reference |
2008-04-08
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Core MIDI Server Framework Reference
(HTML)
Describes the Mac OS X MIDI driver interface.
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Reference |
2008-04-08
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Audio Codec Services Reference
(HTML)
(PDF)
Describes the programming interface for configuring audio codecs and for encoding and decoding audio data.
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Reference |
2007-10-31
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Audio Toolbox Framework Reference
(HTML)
Describes the Core Audio API to access audio files and convert between linear PCM and compressed audio formats.
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Reference |
2006-11-07
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Core Audio Framework Reference
(HTML)
Describes a C API that interfaces with audio hardware and includes data types used throughout Core Audio.
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Reference |
2006-11-07
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Apple Core Audio Format Specification 1.0
(HTML)
(PDF)
Specifies the Apple Core Audio Format (CAF) for audio files.
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Reference |
2006-03-08
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CAPlayThrough
(HTML)
(DMG)
(ZIP)
Illustrates how to use the HAL's Audio Output Unit (AUHAL) for device input and the Default Output Audio Unit for output.
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Sample Code |
2007-08-22
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AudioQueueTools
(HTML)
(DMG)
(ZIP)
Demonstrates usage of the AudioQueue API
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Sample Code |
2007-06-08
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RecordAudioToFile
(HTML)
(DMG)
(ZIP)
Demonstrates recording audio to an AAC file using Core Audio
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Sample Code |
2007-02-27
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TremoloUnit
(HTML)
(DMG)
(ZIP)
Audio unit sample demonstrating how to build an effect unit with a generic view.
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Sample Code |
2006-10-26
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SimplePlayThru
(HTML)
(DMG)
(ZIP)
Use the HAL's Audio Output Unit (AUHAL) for device input and output on a single device (play-thru)
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Sample Code |
2006-10-25
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AudioQueueTest
(HTML)
(DMG)
(ZIP)
Demonstrates AudioQueue, an audio playback API introduced in Mac OS X 10.5
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Sample Code |
2006-08-01
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AudioDeviceNotify
(HTML)
(DMG)
(ZIP)
Demonstrates how to enumerate audio devices attached to the system and how to handle device notifications
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Sample Code |
2006-04-21
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QTAudioExtractionPanel
(HTML)
(DMG)
(ZIP)
Enhances the QTKitPlayer to add an Audio Channel Mapping and Extraction panel
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Sample Code |
2005-06-27
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FilterDemo
(HTML)
(DMG)
(ZIP)
Demonstrates how to write a filter AudioUnit with a custom Cocoa User Interface.
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Sample Code |
2005-06-01
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Optimizing Audio Unit User Experience in Logic Studio
(HTML)
TN2207: How to provide the best user experience with your audio unit in Logic Studio
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Technical Notes |
2009-04-23
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Audio Export - Encoding AAC Audio For MPEG-4 Export
(HTML)
TN2237: The QT MPEG4 Exporter does not show all options for generating AAC, this TN discusses workarounds.
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Technical Notes |
2009-01-27
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Audio Unit Validation Using the auval Tool
(HTML)
TN2204: Test the conformance of audio units to Audio Unit Services.
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Technical Notes |
2008-09-08
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Audio Units: Embedding a Carbon View in a Cocoa Window
(HTML)
TN2213: Carbon-Cocoa Integration for Audio Units
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Technical Notes |
2008-02-29
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The Sonogram View Demo Audio Unit
(HTML)
TN2200: Describes the advanced audio unit features that the associated sample project demonstrates.
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Technical Notes |
2007-11-07
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Using AudioDeviceRead in Mac OS 10.4
(HTML)
TN2113: How to use AudioBufferLists with AudioDeviceRead in Tiger and beyond.
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Technical Notes |
2006-11-29
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Playing a sound file using the Default Output Audio Unit
(HTML)
TN2097: Playing an Audio File using the Default Output Audio Unit
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Technical Notes |
2006-11-15
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Device input using the HAL Output Audio Unit
(HTML)
TN2091: How to get input from an audio device by using the HAL's Output Audio Unit.
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Technical Notes |
2006-07-25
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Handling Audio Unit Events
(HTML)
TN2104: This technote explains how to handle AudioUnit Events
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Technical Notes |
2005-04-29
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The System Sound APIs for Mac OS X 10.2, 10.3 and later
(HTML)
TN2102: Discusses the System Sound APIs for correctly playing Alerts and User Interface Sound Effects
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Technical Notes |
2004-07-13
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Using the 3DMixer Audio Unit
(HTML)
TN2112: Discusses how to use Core Audio's 3DMixer version 2.0
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Technical Notes |
2004-06-14
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AudioChannelLayout - What's the Audio Channel Order when the Layout has a Channel Bitmap?
(HTML)
QA1638: Explains the audio channel order when a channel layout is tagged as kAudioChannelLayoutTag_UseChannelBitmap.
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Technical Q&As |
2009-04-12
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Audio Queue - Looping Compressed Audio
(HTML)
QA1636: Discusses the format information required to seamlessly loop compressed audio using Audio Queue.
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Technical Q&As |
2009-02-20
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Creating Core Audio Format (.caf) Files
(HTML)
QA1534: Describes how to use afconvert to create .caf files
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Technical Q&As |
2009-01-07
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Using the ExtAudioFileSeek and ExtAudioFileTell Functions
(HTML)
QA1609: Describes how to use sample rate correctly when working with audio file positions.
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Technical Q&As |
2008-09-29
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The Default Output Audio Units
(HTML)
QA1577: Describes the Mac OS X output audio units and their purposes.
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Technical Q&As |
2008-08-21
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AudioConverter: How do I know when I am done?
(HTML)
QA1532: Describes how to correctly signal AudioConverter when a conversion is completed.
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Technical Q&As |
2007-08-23
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How to handle kAudioUnitProperty_MaximumFramesPerSlice
(HTML)
QA1533: Illustrates how to use the kAudioUnitProperty_MaximumFramesPerSlice property
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Technical Q&As |
2007-07-16
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Unable to select input device in AU Lab
(HTML)
QA1526: AU Lab only supports physical device singletons.
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Technical Q&As |
2007-05-17
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Standard Audio - Setting output ASBD returns badFormatErr
(HTML)
QA1489: Discusses why badFormatErr may be returned from Standard Audio
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Technical Q&As |
2006-11-15
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Changing the volume of audio devices
(HTML)
QA1016: Demonstrates volume controls for audio devices
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Technical Q&As |
2006-05-02
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CoreAudio Overload Warnings
(HTML)
QA1467: Describes CoreAudio overload warnings what they mean and how to avoid them.
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Technical Q&As |
2006-03-29
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Using NSSound with CoreAudio on Mac OS 10.3.x
(HTML)
QA1394: Workaround the NULL input buffers in a Core Audio IOProc callback when using NSSound by using AudioDeviceAddIOProc
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Technical Q&As |
2006-03-29
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Determine the version of an Audio Unit
(HTML)
QA1408: Determine the version of an Audio Unit
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Technical Q&As |
2005-03-07
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Signaling the end of data when using AudioConverterFillComplexBuffer
(HTML)
QA1317: How to signal the end of data when using AudioConverterFillComplexBuffer to convert audio data.
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Technical Q&As |
2004-04-26
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Audio Unit Resizing
(HTML)
QA1343: Discusses the host's responsibilities when resizing Audio Units.
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Technical Q&As |
2004-03-23
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Use NSSound instead of NSMovie for audio only playback on Mac OS X 10.3 and greater
(HTML)
QA1335: Why using NSSound may be a better choice than using NSMovie for audio only playback.
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Technical Q&As |
2004-02-04
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AudioDevice sample rates
(HTML)
QA1196: Getting, setting and converting sample rates with Audio Devices.
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Technical Q&As |
2003-12-09
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AUGraphs and AudioUnit connections
(HTML)
QA1174: Discusses AudioUnit connection issues when using more than one AudioUnit or an AUGraph.
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Technical Q&As |
2003-12-09
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How to handle audio data with magic cookie information
(HTML)
QA1318: How to handle sound files with magic cookies when using an AudioConverter.
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Technical Q&As |
2003-10-22
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