{"action":"created","issue":{"url":"https://api.github.com/repos/xiph/opus/issues/86","repository_url":"https://api.github.com/repos/xiph/opus","labels_url":"https://api.github.com/repos/xiph/opus/issues/86/labels{/name}","comments_url":"https://api.github.com/repos/xiph/opus/issues/86/comments","events_url":"https://api.github.com/repos/xiph/opus/issues/86/events","html_url":"https://github.com/xiph/opus/issues/86","id":311439705,"number":86,"title":"Pretty significant artifacting even at 320kbps and 384kbps","user":{"login":"Rainboom-Dash","id":38089421,"avatar_url":"https://avatars2.githubusercontent.com/u/38089421?v=4","gravatar_id":"","url":"https://api.github.com/users/Rainboom-Dash","html_url":"https://github.com/Rainboom-Dash","followers_url":"https://api.github.com/users/Rainboom-Dash/followers","following_url":"https://api.github.com/users/Rainboom-Dash/following{/other_user}","gists_url":"https://api.github.com/users/Rainboom-Dash/gists{/gist_id}","starred_url":"https://api.github.com/users/Rainboom-Dash/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Rainboom-Dash/subscriptions","organizations_url":"https://api.github.com/users/Rainboom-Dash/orgs","repos_url":"https://api.github.com/users/Rainboom-Dash/repos","events_url":"https://api.github.com/users/Rainboom-Dash/events{/privacy}","received_events_url":"https://api.github.com/users/Rainboom-Dash/received_events","type":"User","site_admin":false},"labels":[],"state":"open","locked":false,"assignee":null,"assignees":[],"milestone":null,"comments":15,"created_at":"2018-04-05T00:59:17Z","updated_at":"2018-05-01T00:53:29Z","closed_at":null,"author_association":"NONE","body":"So...\r\n\r\nOpus doesn't seem to like a lot of electronic music... on this sample in particular it's having issues...\r\n\r\nHere's the lossless\r\n\r\n[](url)https://drive.google.com/file/d/1ERvzuTO86OcSTBcI7uOLlrY5dGaTE8Px/view?usp=sharing\r\n\r\nEspecially near the beginning and middle...  near the end the music changes and I don't think it's as audible (but then again, I didn't test the end of the sample much... as I was hearing a lot of artifacting in the beginning and middle)\r\n\r\nAt 48kbps it has pretty much the same artifacting but MUCH more audible... it's mainly in the 0-1khz range... same with 320kbps\r\n\r\nThis is the sample encoded with Opus at 48kbps\r\n\r\n[](url)https://drive.google.com/file/d/1DQrGaXP82Wx1H20nlPKtGY7Fts91i6nh/view?usp=sharing\r\n\r\n\r\nIt's whirling/thumping sounds that I'm hearing... mostly artifacts in the 0-1khz range... at 48kbps it's understandable... but at 320.... not so much\r\n\r\n\r\nOh, and here's the ABX test of 320kbps Opus versus lossless\r\n\r\n[](url)https://i.imgur.com/FIsTWC4.png\r\n\r\n\r\nIt seems to be issues with mostly electronic music... at least, I think... \r\n\r\nI used 1.2.1 Opus and VBR\r\n\r\n\r\nAs a comparison to AAC at 48kbps... you can tell it is a lot better because it doesn't have those whirling effects... or at least, drastically reduced\r\n\r\nhttps://drive.google.com/file/d/1R36tsP0NrSxFvekfyeWXSzFMTK_YzkbV/view?usp=sharing\r\n\r\nNow, AAC did use about 7% more bitrate overall... but even then... it's a LOT better"},"comment":{"url":"https://api.github.com/repos/xiph/opus/issues/comments/385572055","html_url":"https://github.com/xiph/opus/issues/86#issuecomment-385572055","issue_url":"https://api.github.com/repos/xiph/opus/issues/86","id":385572055,"user":{"login":"Rainboom-Dash","id":38089421,"avatar_url":"https://avatars2.githubusercontent.com/u/38089421?v=4","gravatar_id":"","url":"https://api.github.com/users/Rainboom-Dash","html_url":"https://github.com/Rainboom-Dash","followers_url":"https://api.github.com/users/Rainboom-Dash/followers","following_url":"https://api.github.com/users/Rainboom-Dash/following{/other_user}","gists_url":"https://api.github.com/users/Rainboom-Dash/gists{/gist_id}","starred_url":"https://api.github.com/users/Rainboom-Dash/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/Rainboom-Dash/subscriptions","organizations_url":"https://api.github.com/users/Rainboom-Dash/orgs","repos_url":"https://api.github.com/users/Rainboom-Dash/repos","events_url":"https://api.github.com/users/Rainboom-Dash/events{/privacy}","received_events_url":"https://api.github.com/users/Rainboom-Dash/received_events","type":"User","site_admin":false},"created_at":"2018-05-01T00:53:28Z","updated_at":"2018-05-01T00:53:28Z","author_association":"NONE","body":"Okay... the one I tested was the lossless one... just now I was looking at the spectrogram of the 384kbps Opus one so of course that cut off at 20khz and made me think it was the 320 mp3 version....\r\n\r\nI just re-tested just to make sure with the truly lossless from Bandcamp with 320kbps Opus and the artifacting was extremely audible... didn't even need to ABX... I started the ABX test but then was immediately able to tell which one was which from the 1:45 to 1:50 mark or so..."}}
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