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core audio - iOS FFT Draw spectrum - Stack Overflow
https://stackoverflow.com/questions/15568607/ios-fft-draw-spectrum
SInt16 rawValue = fft[0]; // let's say this comes back as 12990 float scaledValue = rawValue/32767.; // This is MAX_INT for 16-bit; // dividing we get .396435438 which is much easier for most people // to see conceptually as 39% of our max possible value float displayValue = log2(scaledValue); my_fft[0] = displayValue;
FFT on the App Store
https://apps.apple.com/us/app/fft/id298840058
Description. FFT is a high-resolution audio analysis tool for the iPhone and iPod touch. It uses the Fast Fourier Transform to analyze incoming audio, and displays a very detailed graph of amplitude vs. frequency. Use this app with the built-in iOS device microphone, or upgrade to our iAudioInterface2 or iTestMic for a complete professional solution.
Audio Spectrum on the App Store
https://apps.apple.com/app/id861956934
4.8 • 23 Ratings. $0.99. Screenshots. iPhone. iPad. Description. Audio Spectrum is a real-time FFT spectrum analyzer. It gives you a visual representation of an acoustic signal. It can be used to measure the frequency response of audio equipment or to analyze different sounds (e.g. sounds of musical instruments).
AudioTools - dB, Sound & Audio on the App Store
https://apps.apple.com/us/app/audiotools-db-sound-audio/id325307477
AudioTools from Studio Six Digital is a suite of professional-grade audio and acoustic analysis apps. Included in the price of this app is a great collection of professional tools -- SPL, RTA, FFT, Speaker Polarity Test, Generator, Audio Scope, CLF Viewer, and Recorder, and the framework to add more powerful modules as you need them.
Audio Analyzer on the App Store
https://apps.apple.com/us/app/audio-analyzer/id681184981
Audio Analyzer is a real-time spectrum, spectrogram, oscilloscope and octave RTA analyzer. It gives you a visual representation of an acoustic signal. It can be used to analyze the sounds of musical instruments, to identify spoken words phonetically, …
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