{"action":"created","issue":{"url":"https://api.github.com/repos/WebAudio/web-audio-api/issues/470","labels_url":"https://api.github.com/repos/WebAudio/web-audio-api/issues/470/labels{/name}","comments_url":"https://api.github.com/repos/WebAudio/web-audio-api/issues/470/comments","events_url":"https://api.github.com/repos/WebAudio/web-audio-api/issues/470/events","html_url":"https://github.com/WebAudio/web-audio-api/issues/470","id":55930662,"number":470,"title":"Define FFT for AnalyzerNode","user":{"login":"rtoy","id":663356,"avatar_url":"https://avatars.githubusercontent.com/u/663356?v=3","gravatar_id":"","url":"https://api.github.com/users/rtoy","html_url":"https://github.com/rtoy","followers_url":"https://api.github.com/users/rtoy/followers","following_url":"https://api.github.com/users/rtoy/following{/other_user}","gists_url":"https://api.github.com/users/rtoy/gists{/gist_id}","starred_url":"https://api.github.com/users/rtoy/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/rtoy/subscriptions","organizations_url":"https://api.github.com/users/rtoy/orgs","repos_url":"https://api.github.com/users/rtoy/repos","events_url":"https://api.github.com/users/rtoy/events{/privacy}","received_events_url":"https://api.github.com/users/rtoy/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":1,"created_at":"2015-01-29T17:32:51Z","updated_at":"2015-01-29T18:44:34Z","closed_at":null,"body":"The FFT is not specified for the AnalyzerNode.  There is at least the mathmatician's definition and the engineer's definition which are slightly different.  And the FFT has at least 3 different possible scalings (1, 1/N, 1/sqrt(N)), so that means at least 6 different possible implementations.\r\n\r\nI believe all implementations use the engineering definition with a scale factor of 1:\r\n\r\nX(k) = sum(x(n)*exp(-j*2*pi*k*n/N), n = 0, N - 1)"},"comment":{"url":"https://api.github.com/repos/WebAudio/web-audio-api/issues/comments/72080071","html_url":"https://github.com/WebAudio/web-audio-api/issues/470#issuecomment-72080071","issue_url":"https://api.github.com/repos/WebAudio/web-audio-api/issues/470","id":72080071,"user":{"login":"hughrawlinson","id":829836,"avatar_url":"https://avatars.githubusercontent.com/u/829836?v=3","gravatar_id":"","url":"https://api.github.com/users/hughrawlinson","html_url":"https://github.com/hughrawlinson","followers_url":"https://api.github.com/users/hughrawlinson/followers","following_url":"https://api.github.com/users/hughrawlinson/following{/other_user}","gists_url":"https://api.github.com/users/hughrawlinson/gists{/gist_id}","starred_url":"https://api.github.com/users/hughrawlinson/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hughrawlinson/subscriptions","organizations_url":"https://api.github.com/users/hughrawlinson/orgs","repos_url":"https://api.github.com/users/hughrawlinson/repos","events_url":"https://api.github.com/users/hughrawlinson/events{/privacy}","received_events_url":"https://api.github.com/users/hughrawlinson/received_events","type":"User","site_admin":false},"created_at":"2015-01-29T18:44:34Z","updated_at":"2015-01-29T18:44:34Z","body":":+1:"}}