tempi-fft | time audio input and FFT | Video Utils library

tempi-fft is a Swift library typically used in Video, Video Utils applications. tempi-fft has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

TempiFFT demonstrates how to input audio via AVFoundation for recording or processing and implements an FFT to display a real-time spectrum plot of incoming audio. What's an FFT? Short for Fast Fourier Transform, it's a method for deconstructing an audio signal (or any time-based signal for that matter) into its constituent frequencies and intensities. The FFT function is a crucial component for nearly all audio DSP. Doesn't Apple's Accelerate framework already include an FFT? Yes, and this project makes use of it. But Accelerate's FFT function (vDSP_fft_zrip) isn't trivial to call or set up correctly (esp. from Swift) and is just one necessary ingredient to a functional FFT. What's “logical banding”? Actually I made that term up so maybe there's a better name for it, but logical banding adds an interface on top of the raw FFT data so that you can, for example, analyze the data at 5 bands per octave across a 6 octave range. How do you pronounce Tempi? TEMP-ee.