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Apple Developer Documentation
https://developer.apple.com/documentation/audiotoolbox/1440371-audiounitsetproperty
The audio unit element for the property. inData The value that you want to apply to the property. May be NULL (see Discussion). Always pass property values by reference. For example, for a property value of type CFStringRef, pass it as &myCFString. inDataSize The size of the data you are providing in the inData parameter. Return Value
c++ - CoreAudio AudioUnitSetProperty always fails to set ...
https://stackoverflow.com/questions/2170523/coreaudio-audiounitsetproperty-always-fails-to-set-sample-rate
I need to change the output sample rate from 44.1 to 32.0, but it always throws an error, Out: AudioUnitSetProperty-SF=\217\325\377\377, -10865. I don't know why it …
iOS音频(2)——Audio Unit - 简书 - jianshu.com
https://www.jianshu.com/p/9f033d08accb
UInt32 one = 1; AudioUnitSetProperty(outputUnit, kAudioOutputUnitProperty_EnableIO, kAudioUnitScope_Input, 1, &one, sizeof(one)); 三、数据处理 3.1、AURenderCallbackStruct. 在Audio Unit存储输入的数据和提供播放输出数据都是通过RenderCallback函数，通过AudioUnitSetProperty与输入输出回调相关联。
Audio Unit详解 - 简书 - jianshu.com
https://www.jianshu.com/p/8ce865c9bbac
七、AudioUnitSetProperty配置audio unit. AudioUnitProperty是一个键值对。以下是audio unit开发中常用的一些属性： kAudioOutputUnitProperty_EnableIO：用于在I/O unit上启用和禁用input or output。默认情况输出已启用，输入已禁用 kAudioUnitProperty_ElementCount：用于配置mixer unit上输入elements的 ...
Technical Note TN2091: Device input using the HAL …
https://developer.apple.com/library/archive/technotes/tn2091/_index.html
The AUGraph APIs (in AudioToolbox.framework) can manage these connections for you. An AUGraph is a high level representation of a set of Audio Units and connections between them. See the Audio Unit Processing Graph Services Reference for more information.. If you have two separate audio devices, two AUHALs will be required.
Audio APIs, Part 1: Core Audio / macOS - Bastibe.de
https://bastibe.de/2017-06-17-audio-apis-coreaudio.html
An audio unit can be a source (aka microphone), a sink (aka speaker) or an audio processor (both sink and source). Each audio unit can have several input buses, and several output buses, each of which can have several channels. The meaning of these buses varies wildly and is often underdocumented.
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