bmh161於 2009年4月9日星期四 UTC+8下午9時22分55秒寫道：

This is probably a stupid question but, well, I'm not all that smart...

Instead of going through all the trouble of designing complicated digital filters, why don't we just pick the frequencies that we want to supress and replace those bins in the FFT with zeros?

You may be interested in the simple experiment using matlab.

https://poweidsplearningpath.blogspot.com/2019/04/dftidft.html
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