Filtering in the Frequency Domain

Convolution becomes multiplication — the trade that makes the FFT worth its complexity, plus the ringing, the wrap-around and the cross terms it hides.

5 tasks

1. Convolution Becomes Multiplication
2. The Brick Wall Rings
3. Trade the Ringing for a Softer Edge
4. A Tone Buried in Noise
5. Multiplying Spectra Convolves in a Circle

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