payload: {"action":"closed","issue":{"url":"https://api.github.com/repos/jaakkopasanen/AutoEq/issues/58","repository_url":"https://api.github.com/repos/jaakkopasanen/AutoEq","labels_url":"https://api.github.com/repos/jaakkopasanen/AutoEq/issues/58/labels{/name}","comments_url":"https://api.github.com/repos/jaakkopasanen/AutoEq/issues/58/comments","events_url":"https://api.github.com/repos/jaakkopasanen/AutoEq/issues/58/events","html_url":"https://github.com/jaakkopasanen/AutoEq/issues/58","id":456585763,"node_id":"MDU6SXNzdWU0NTY1ODU3NjM=","number":58,"title":"Consider correcting phase as well as magnitude?","user":{"login":"simontheflutist","id":13023178,"node_id":"MDQ6VXNlcjEzMDIzMTc4","avatar_url":"https://avatars2.githubusercontent.com/u/13023178?v=4","gravatar_id":"","url":"https://api.github.com/users/simontheflutist","html_url":"https://github.com/simontheflutist","followers_url":"https://api.github.com/users/simontheflutist/followers","following_url":"https://api.github.com/users/simontheflutist/following{/other_user}","gists_url":"https://api.github.com/users/simontheflutist/gists{/gist_id}","starred_url":"https://api.github.com/users/simontheflutist/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/simontheflutist/subscriptions","organizations_url":"https://api.github.com/users/simontheflutist/orgs","repos_url":"https://api.github.com/users/simontheflutist/repos","events_url":"https://api.github.com/users/simontheflutist/events{/privacy}","received_events_url":"https://api.github.com/users/simontheflutist/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":4,"created_at":"2019-06-15T23:42:20Z","updated_at":"2019-09-05T09:17:27Z","closed_at":"2019-09-05T09:17:27Z","author_association":"NONE","body":"This is a high-level feature request, and might be the first of its kind ever proposed. If we approximate headphones as having a transfer function, then we would say that at every frequency the headphone transfer function has both _magnitude_ and _phase_.\r\n\r\nMuch effort has been expended to correct for magnitude, but I am wondering if we can work towards creating convolution filters that correct phase distortion as well. Here is one way that might be possible.\r\n\r\n1. Extract an impulse response for a particular set of headphones from InnerFidelity.\r\n2. Take the Fourier transform of this impulse response, so we have a complex coefficient at every frequency.\r\n3. Replace this Fourier transform with its inverse at every frequency.\r\n4. Apply the inverse DFT to get a new time domain impulse response. This impulse response cancels out the impulse response that the headphones are effectively convolving _their_ input signal with.\r\n5. Apply target response (e.g. Harman2017) to this impulse response."}}
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