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ios - AudioBuffer to NSData - Stack Overflow
https://stackoverflow.com/questions/18081950/audiobuffer-to-nsdata
I manage to get samples from microphone with that tutorial. I minimalize metod processBuffer: to copy samples to audioBuffer. My question in, how can I convert AudioBuffer to NSData?
Apple Developer Documentation
https://developer.apple.com/documentation/coreaudiotypes/audiobufferlist
The AudioBufferList structure provides a mechanism for encapsulating one or more buffers of audio data. It is used by functions in various Core Audio APIs, as described in Audio Converter Services, Audio Unit Component Services, and Extended Audio File Services.
用AudioBuffer里的数据得到音量_Glassy_sky1207的博客-CSDN博客
https://blog.csdn.net/Glassy_sky1207/article/details/78681607
AudioBufferList里的buffer里面的数据，根据设置不同，有可能是0-1的float类型，也有可能是int类型，如果是int类型，需要转化为0-1的float类型。. 根据这些数据计算音量，需要用到vDSP库，这个库已经封装了很多快速计算的方法，不需要我们自己去实现。. 计算代码如下 ...
用AudioBuffer里的数据得到音量_Glassy_sky1207的博客-程序员秘 …
https://cxymm.net/article/Glassy_sky1207/78681607
AudioBufferList里的buffer里面的数据，根据设置不同，有可能是0-1的float类型，也有可能是int类型，如果是int类型，需要转化为0-1的float类型。 根据这些数据计算音量，需要用到vDSP库，这个库已经封装了很多快速计算的方法，不需要我们自己去实现。
NSData Class (Foundation) | Microsoft Docs
https://docs.microsoft.com/en-us/dotnet/api/foundation.nsdata
NSData (Int Ptr, nuint, Action<Int Ptr,nuint>) NSData (NSCoder) A constructor that initializes the object from the data stored in the unarchiver object. NSData (NSData, NSData Base64Decoding Options) NSData (NSObject Flag) Constructor to call on derived classes to skip initialization and merely allocate the object.
Converting PCM audio data from CMSampleBuffer to AAC
https://social.msdn.microsoft.com/Forums/en-US/cc7ae537-77d9-407a-9065-45b7506ec327/converting-pcm-audio-data-from-cmsamplebuffer-to-aac
User360092 posted. I should note in case it matters, here is what I'm working with. The device I'm trying to run on is a iPod Touch 5th gen running iOS 9.3.5
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