{"action":"opened","issue":{"url":"https://api.github.com/repos/MTG/essentia/issues/487","repository_url":"https://api.github.com/repos/MTG/essentia","labels_url":"https://api.github.com/repos/MTG/essentia/issues/487/labels{/name}","comments_url":"https://api.github.com/repos/MTG/essentia/issues/487/comments","events_url":"https://api.github.com/repos/MTG/essentia/issues/487/events","html_url":"https://github.com/MTG/essentia/issues/487","id":184234182,"number":487,"title":"implement inverse 12 MFCCs for visualisation ","user":{"login":"georgid","id":5612394,"avatar_url":"https://avatars.githubusercontent.com/u/5612394?v=3","gravatar_id":"","url":"https://api.github.com/users/georgid","html_url":"https://github.com/georgid","followers_url":"https://api.github.com/users/georgid/followers","following_url":"https://api.github.com/users/georgid/following{/other_user}","gists_url":"https://api.github.com/users/georgid/gists{/gist_id}","starred_url":"https://api.github.com/users/georgid/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/georgid/subscriptions","organizations_url":"https://api.github.com/users/georgid/orgs","repos_url":"https://api.github.com/users/georgid/repos","events_url":"https://api.github.com/users/georgid/events{/privacy}","received_events_url":"https://api.github.com/users/georgid/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":0,"created_at":"2016-10-20T13:46:16Z","updated_at":"2016-10-20T13:46:16Z","closed_at":null,"body":"The first 12-15 MFCCs are standard for describing singing voice timbre. The MFCC feature vector however does not represent visually well the singing voice. Instead, a common practice is to use for visualisation the inverted first 12 MFCC coefficients to spectral domain.\r\nPort from the invmelfcc.m  as explained here http://labrosa.ee.columbia.edu/matlab/rastamat/"}}
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