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detectingaudiofrequency's Introduction

DetectingAudioFrequency

An example iPhone project to show how to detect frequency of captured microphone audio. This project illustrates this stackoverflow answer: http://stackoverflow.com/questions/11686625/get-hz-frequency-from-audio-stream-on-iphone/19966776#19966776

This project uses Apple's Accelerate.framework to perform CPU consuming digital signal processing.

  1. Generate a specific frequency using Audacity for example.
  2. Run the project, play the sound.

The main stuff that does FFT is inside FFTHelper.mm.

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