3 ms·This is _Hacker_ News, we want to know _how_, not _what_ ;-)by madair 17y agoThis is _Hacker_ News, we want to know _how_, not _what_ ;-)shellerik 17y agoI'd have to guess he used some kind of fourier analysis.miratom 17y agoYep...actually a pretty trivial example of Fourier analysis.