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Audio DSP: Real-Time Fast Fourier Transform (FFT) for Audio Spectrum Visualizers

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1y ago · Jan 22, 2025 4:54 PM

Cooley-Tukey Radix-2 FFT algorithm converts PCM audio sample time-domain waveforms into frequency spectrum bins (bass, mids, highs).

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1y ago · Jan 22, 2025 10:21 PM

Applying a Hann/Hamming window function before FFT reduces spectral leakage across frequency bins.

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1y ago · Jan 23, 2025 5:21 AM

Drawing frequency bars with ImGui using logarithmic frequency scaling (20Hz - 20kHz) matches human hearing perception perfectly!

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