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Scientific Discussion / Re: Are complex-input FFTs really useful for audio analysis?
Last post by TF3RDL -Its just smart optimization, to make faster processing.That's why treating the stereo input as complex numbers (useful for SDR-related I/Q signals, but idk for audio, assuming you skipped the process of turning into a stereo FFT) in the aforementioned CodePen project is faster than without, and that could be helpful optimization for @Crossover's foo_enhanced_spectrum_analyzer when comes to a feature request to display multiple channels but I'd imagine it only works on stereo pairs (especially on surround sound formats where you have center and LFE channels in-addition to usual channel pairs)
Using 2 FFT transforms for real-only inputs is stupid, if you insist on using separate transforms use RDFT and not FFT.