{"id":1027,"date":"2019-10-17T07:48:41","date_gmt":"2019-10-17T07:48:41","guid":{"rendered":"http:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/?p=1027"},"modified":"2019-10-29T08:37:04","modified_gmt":"2019-10-29T08:37:04","slug":"analysing-your-designs-for-loudness-units","status":"publish","type":"post","link":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/2019\/10\/17\/analysing-your-designs-for-loudness-units\/","title":{"rendered":"Analysing your designs for loudness units"},"content":{"rendered":"

It may be useful to quickly check that you’re EBUR28 compliant. Basically if you’re looking to generate broadcast compliant material, then you’ll need to be aware of these rules, up to date on the thinking and have some production strategies so that you know what you’re with loudness.<\/p>\n

The EBU recommendation for measuring loudness and for the peak impression of loudness across a programme of material is explained here;\u00a0https:\/\/tech.ebu.ch\/docs\/r\/r128.pdf.<\/p>\n

Their recommendation is that “Programme Loudness Level shall be normalised to a Target Level of -23.0 LUFS”, that’s -23.0 Loudness units at full scale.\u00a0 The command line can sort you out here by giving you a very quick readout of the loudness units of your track:<\/p>\n

cd into your directory and run this with FFMPEG<\/p>\n

\n
ffmpeg -i yourSoundFile.wav -filter:a \"ebur128\" -vn -f null \/dev\/null \n\n\n<\/pre>\n<\/blockquote>\n
You’ll get something like this:<\/p>\n
\n
Output #0, null, to '\/dev\/null':\n\u00a0 Metadata:\n\u00a0\u00a0\u00a0 encoder\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : Lavf57.71.100\n\u00a0\u00a0\u00a0 Stream #0:0: Audio: pcm_s16le, 48000 Hz, mono, s16, 768 kb\/s\n\u00a0\u00a0\u00a0 Metadata:\n\u00a0\u00a0\u00a0\u00a0\u00a0 encoder\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : Lavc57.89.100 pcm_s16le\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.0999792\u00a0 M:-120.7 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -70.0 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.199979\u00a0\u00a0 M:-120.7 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -70.0 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.299979\u00a0\u00a0 M:-120.7 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -70.0 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.399979\u00a0\u00a0 M: -21.9 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -21.9 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.499979\u00a0\u00a0 M: -20.7 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -21.2 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.599979\u00a0\u00a0 M: -20.4 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -21.0 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.699979\u00a0\u00a0 M: -20.6 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -20.9 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.799979\u00a0\u00a0 M: -21.5 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -21.0 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\n[Parsed_ebur128_0 @ 0x7ffe02522300] t: 0.899979\u00a0\u00a0 M: -22.7 S:-120.7\u00a0\u00a0\u00a0\u00a0 I: -21.2 LUFS\u00a0\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0 0.0 LU\nsize=N\/A time=00:00:00.98 bitrate=N\/A speed=95.6x\u00a0\u00a0 \u00a0\nvideo:0kB audio:92kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown\n[Parsed_ebur128_0 @ 0x7ffe02522300] Summary:\n\n\u00a0 Integrated loudness:\n\u00a0\u00a0\u00a0 I:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 -21.2 LUFS\n\u00a0\u00a0\u00a0 Threshold: -31.2 LUFS\n\n\u00a0 Loudness range:\n\u00a0\u00a0\u00a0 LRA:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0.0 LU\n\u00a0\u00a0\u00a0 Threshold:\u00a0\u00a0 0.0 LUFS\n\u00a0\u00a0\u00a0 LRA low:\u00a0\u00a0\u00a0\u00a0 0.0 LUFS\n\u00a0\u00a0\u00a0 LRA high:\u00a0\u00a0\u00a0 0.0 LUFS<\/pre>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"
It may be useful to quickly check that you’re EBUR28 compliant. Basically if you’re looking to generate broadcast compliant material, then you’ll need to be aware of these rules, up to date on the thinking and have some production strategies …<\/p>\n
  Analysing your designs for loudness units<\/span> Read More »<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[32],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/posts\/1027"}],"collection":[{"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/comments?post=1027"}],"version-history":[{"count":3,"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/posts\/1027\/revisions"}],"predecessor-version":[{"id":1337,"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/posts\/1027\/revisions\/1337"}],"wp:attachment":[{"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/media?parent=1027"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/categories?post=1027"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/digital.eca.ed.ac.uk\/sounddesignmedia\/wp-json\/wp\/v2\/tags?post=1027"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}