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AVAudioSession / Audio Session Services switching output
https://stackoverflow.com/questions/15330777/avaudiosession-audio-session-services-switching-output
//Deactivate the audio session [[AVAudioSession sharedInstance] setActive:NO error:nil]; On the flip side, if the headset is in and the music is playing through the headset when the app is started into the recording mode, then there is only a brief pause and the music continues playing at the same volume (correctly, no ducking).
Apple Developer Documentation
https://developer.apple.com/documentation/avfaudio/avaudiosession
Overview. An audio session acts as an intermediary between your app and the operating system—and, in turn, the underlying audio hardware. You use an audio session to communicate to the operating system the general nature of your app’s audio without detailing the specific behavior or required interactions with the audio hardware.
AVAudioSession : understanding and… | Apple Developer …
https://developer.apple.com/forums/thread/25197
The AVAudioSession preferredBufferDuration setting has an obvious affect on latency. The actual RemoteIO buffer latency will often vary between foreground and background mode and whether any other audio apps are running. Latency might also be larger if the RemoteIO buffer sample rate is different from the hardware sample rate.
Apple Developer Documentation
https://developer.apple.com/documentation/avfaudio/avaudiosession/1616443-overrideoutputaudioport
Discussion. If your app uses the play And Record category, calling this method with the AVAudio Session.Port Override.speaker option causes the system to route audio to the built-in speaker and microphone regardless of other settings. This change remains in effect only until the current route changes or you call this method again with the AVAudio Session.Port Override.none option.
sdks/AVAudioSession.h at master · theos/sdks · GitHub
https://github.com/theos/sdks/blob/master/iPhoneOS9.3.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVAudioSession.h
the names used in the 'C' language Audio Session API. In this API, an audio "route" is made up of zero or more input "ports" and zero or more ouput "ports". If the current audio category does not support inputs, the route will consist purely of : outputs. Conversely, if the category does not support output, the route will: consist purely of inputs.
AVCaptureSession and the AVAudioSession Aggregated …
https://developer.apple.com/forums/thread/61594
Opting-out is done by setting the AVAudioSessionIOTypeAggregated preference and may be appropriate if your application makes use of AVCaptureSession along with the AVAudioSessionCategoryPlayAndRecord category and has a requirement that all audio input and output be presented in the same real-time I/O callback (for example, makes use of the Remote …
AVAudioSession Class (AVFoundation) | Microsoft Docs
https://docs.microsoft.com/en-us/dotnet/api/avfoundation.avaudiosession
void Setup () { AVAudioSession.SharedInstance ().Init (); NSError error; if (!AVAudioSession.SharedInstance ().SetCategory (AVAudioSessionCategory.Playback, out error)) { ReportError (error); return; } AVAudioSession.Notifications.ObserveInterruption (ToneInterruptionListener); if (!AVAudioSession.SharedInstance ().SetActive (true, out error)) { …
Technical Q&A QA1799: AVAudioSession - Microphone Selection
https://developer.apple.com/library/archive/qa/qa1799/_index.html
AVAudioSession - Microphone Selection Q: How can I choose a specific built-in microphone when recording? A: iOS 6 automatically selects the choice of built-in microphone (on devices that have two or more built-in microphones) through the use of audio session modes. Modes affect possible routes and the digital signal processing used for input.
Guide - HERE SDK for iOS (Premium Edition) - HERE Developer
https://developer.here.com/documentation/ios-premium/3.18/dev_guide/topics/audio-management.html
The section also contains information about audio routing, e.g. how to use HERE SDK audio with a Bluetooth device.. NMAAudioManager and the Audio Queue. NMAAudioManager is the central class that is used by SDK for iOS to modify the application AVAudioSession and play audio. It is the interface that the NMANavigationManager uses to play audio feedback such as voice …
Audio Recipes for iOS - Stanford University
https://ccrma.stanford.edu/~jsanchez/NSSpain.pdf
AVAudioSession Audio Session Services High-level wraper with most ... //Create an instance of AVAudioSession AVAudioSession *session = [AVAudioSession sharedInstance]; ... • I/O Unit: Remote I/O, Voice-Processing I/O, Generic Output • Format conversion: Format converter Available Units for iOS @jsanchezsierra
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