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Apple Developer Documentation
https://developer.apple.com/documentation/audiotoolbox/1440371-audiounitsetproperty
Discussion. To clear an audio unit property value, set the inData parameter to NULL and set the inDataSize parameter to 0. Clearing properties works only for …
Apple Developer Documentation
https://developer.apple.com/documentation/audiotoolbox/1439840-audiounitgetproperty
Discussion. Some Core Audio property values are C types and others are Core Foundation objects. If you call this function to retrieve a value that is a Core Foundation object, then this function—despite the use of “Get” in its name—duplicates the object. You are responsible for releasing the object, as described in The Create Rule in ...
ios - How can I mute microphone input volume using ...
https://stackoverflow.com/questions/25245860/how-can-i-mute-microphone-input-volume-using-audiounits
-(void) setMuteOn { AudioUnitParameterValue volume = 0.0; AudioUnitSetProperty(audioUnit, kMultiChannelMixerParam_Volume, kAudioUnitScope_Input, 1, &volume, 0); } But it doesn't work. Perhaps I need to do some kind of refresh on my audioUnit, I don't know. Any help would be great.
Audio Unit详解 - 简书
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 ...
iOS音频(2)——Audio Unit - 简书
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。
kAudioUnitErr_TooManyFramesToProce… | Apple …
https://developer.apple.com/forums/thread/96021
for example I am using the mixer to control volume and the examples show this: ... However mMixer (audio_engine.mainMixerNode) is not an acceptable parameter to the swifts AudioUnitSetProperty() api. So I am not sure I am configuring the nodes properly anyway. The engine has a number of nodes as follows:
AudioUnit添加背景音乐(六) - 简书 - jianshu.com
https://www.jianshu.com/p/431239ca0722
AudioUnit添加背景音乐(六) 前言. 如果我要将自己录制的音频和另外一首音乐混合，如何做呢？这种场景非常常见，K歌应用中，将自己的录音和伴奏混合，视频录制在，给自己录制的声音添加一点背景音乐等等。
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