Iphone Hardware Audio Encoder | Audio-Digital.net

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Using Audio - Apple Developer

https://developer.apple.com/library/archive/documentation/AudioVideo/Conceptual/MultimediaPG/UsingAudio/UsingAudio.html

Audio encoder/recording format. Hardware-assisted encoding. Software-based encoding. AAC (MPEG-4 Advanced Audio Coding) Yes, starting in iOS 3.1 for iPhone 3GS and iPod touch (2nd generation) Yes, starting in iOS 3.2 …

Audio codec used over bluetooth by an iPh ... - Apple

https://discussions.apple.com/thread/6654180

mp3/aac/alac/flac -> PCM (ios decoder) -> AAC (ios encoder for bluetooth a2dp protocol and received by headphone) -> PCM (headphone decoder) -> DAC into analog signal (headset) -> amplifier-> Sound you hear. apart from the source file quality, the AAC for bluetooth transmission is also crucial for the final sound quality you can get.

What Is Core Audio? - Apple Developer

https://developer.apple.com/library/archive/documentation/MusicAudio/Conceptual/CoreAudioOverview/WhatisCoreAudio/WhatisCoreAudio.html

The audio units provided in iOS do not have user interfaces. Their main use is to provide low-latency audio in your application. For more on iPhone audio units, see Core Audio Plug-ins: Audio Units and Codecs. In Mac apps that you develop, you can use system-supplied or third-party-supplied audio units.

ios - How to utilize hardware decode for audio? - Stack ...

https://stackoverflow.com/questions/13804429/how-to-utilize-hardware-decode-for-audio

Set the inSpecifier parameter to an array of AudioClassDescription structures that describes a set of one or more audio codecs. If the property value is the same as the size of the array in the inSpecifier parameter, all of the specified codecs can be used. Available in iOS 3.0 and later. Declared in AudioFormat.h.

Hardware Video Encoding on iPhone — RTSP Server example

http://www.gdcl.co.uk/2013/02/20/iOS-Video-Encoding.html

Hardware Video Encoding on iPhone — RTSP Server example. On iOS, the only way to use hardware acceleration when encoding video is to use AVAssetWriter, and that means writing the compressed video to file. ... Only video is written using the AVAssetWriter instance, or it would be impossible to distinguish video from audio in the mdat atom.

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