{"id":1980,"date":"2026-07-11T10:00:00","date_gmt":"2026-07-11T08:00:00","guid":{"rendered":"https:\/\/www.pcjv.de\/?p=1980"},"modified":"2026-07-24T17:28:12","modified_gmt":"2026-07-24T15:28:12","slug":"gll-tools-measurement-modernized","status":"publish","type":"post","link":"https:\/\/www.pcjv.de\/?p=1980","title":{"rendered":"gll-tools: measurement, modernized"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The measurement thread from the retrospective never ended \u2014 it moved to Go. <a href=\"https:\/\/github.com\/CWBudde\/gll-tools\" target=\"_blank\" rel=\"noopener\">gll-tools<\/a> is a Go library and a set of CLI tools for reading EASE GLL (Generic Loudspeaker Library) data, the format the pro-audio world uses to describe loudspeaker directivity and behavior.<\/p>\n\n\n\n<!--more-->\n\n\n\n<h2 class=\"wp-block-heading\">From plugin analysis to loudspeaker data<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Twenty years ago I measured VST plugins and averaged HRTF databases; today I work with loudspeaker and acoustic measurement data. The formats changed \u2014 GLL, SOFA, DAFF \u2014 but the discipline is identical: read the data faithfully, understand exactly what each number means, and build tools that let you look at it from every angle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Standing on old code<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This project has unusually deep roots in my own history. I wrote <a href=\"https:\/\/github.com\/CWBudde\/PasSofa\" target=\"_blank\" rel=\"noopener\">PasSofa<\/a>, an Object Pascal reader for SOFA (Spatially Oriented Format for Acoustics) files, back in 2017 \u2014 and then ported it to JavaScript as WebSofa, along with an HDF library, because SOFA is HDF underneath. Even the little <a href=\"https:\/\/github.com\/CWBudde\/XL2-marker-shifter\" target=\"_blank\" rel=\"noopener\">XL2-marker-shifter<\/a> \u2014 a one-evening web tool that shifts markers in an NTi XL2 measurement file by a fixed offset \u2014 belongs to this thread: small, specific tools that remove one concrete annoyance from acoustic measurement work.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why CLI tools?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The old measurement programs were Windows GUI applications. The new ones are libraries with thin CLI frontends, because that is what measurement work actually wants in 2026: scriptable, pipeable, automatable, runnable on a headless box next to the measurement rig. Go&#8217;s single-binary deployment is a perfect fit \u2014 copy one file to the machine and start working.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The measurement thread from the retrospective never ended \u2014 it moved to Go. gll-tools is a Go library and a set of CLI tools for reading EASE GLL (Generic Loudspeaker Library) data, the format the pro-audio world uses to describe loudspeaker directivity and behavior.<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4,41],"tags":[],"class_list":["post-1980","post","type-post","status-publish","format-standard","hentry","category-dsp","category-go"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>gll-tools: measurement, modernized - Christian&#039;s private site<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.pcjv.de\/?p=1980\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Christian\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980\"},\"author\":{\"name\":\"Christian\",\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/#\\\/schema\\\/person\\\/79b654f8c2fb5bf9405ccc4cb1c11880\"},\"headline\":\"gll-tools: measurement, modernized\",\"datePublished\":\"2026-07-11T08:00:00+00:00\",\"dateModified\":\"2026-07-24T15:28:12+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980\"},\"wordCount\":251,\"articleSection\":[\"DSP\",\"Go\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980\",\"url\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980\",\"name\":\"gll-tools: measurement, modernized - Christian&#039;s private site\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/#website\"},\"datePublished\":\"2026-07-11T08:00:00+00:00\",\"dateModified\":\"2026-07-24T15:28:12+00:00\",\"author\":{\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/#\\\/schema\\\/person\\\/79b654f8c2fb5bf9405ccc4cb1c11880\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.pcjv.de\\\/?p=1980\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/?p=1980#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.pcjv.de\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"gll-tools: measurement, modernized\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/#website\",\"url\":\"https:\\\/\\\/www.pcjv.de\\\/\",\"name\":\"Christian&#039;s private site\",\"description\":\"Private site of Christian-W. Budde\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.pcjv.de\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.pcjv.de\\\/#\\\/schema\\\/person\\\/79b654f8c2fb5bf9405ccc4cb1c11880\",\"name\":\"Christian\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/009d545df1a458e74ec172fa5dc19428c1144c2ee8f1ec82d94c3b28f12a0c14?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/009d545df1a458e74ec172fa5dc19428c1144c2ee8f1ec82d94c3b28f12a0c14?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/009d545df1a458e74ec172fa5dc19428c1144c2ee8f1ec82d94c3b28f12a0c14?s=96&d=mm&r=g\",\"caption\":\"Christian\"},\"sameAs\":[\"http:\\\/\\\/www.savioursofsoul.de\\\/Christian\"],\"url\":\"https:\\\/\\\/www.pcjv.de\\\/?author=3\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"gll-tools: measurement, modernized - Christian&#039;s private site","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.pcjv.de\/?p=1980","twitter_misc":{"Written by":"Christian","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.pcjv.de\/?p=1980#article","isPartOf":{"@id":"https:\/\/www.pcjv.de\/?p=1980"},"author":{"name":"Christian","@id":"https:\/\/www.pcjv.de\/#\/schema\/person\/79b654f8c2fb5bf9405ccc4cb1c11880"},"headline":"gll-tools: measurement, modernized","datePublished":"2026-07-11T08:00:00+00:00","dateModified":"2026-07-24T15:28:12+00:00","mainEntityOfPage":{"@id":"https:\/\/www.pcjv.de\/?p=1980"},"wordCount":251,"articleSection":["DSP","Go"],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/www.pcjv.de\/?p=1980","url":"https:\/\/www.pcjv.de\/?p=1980","name":"gll-tools: measurement, modernized - Christian&#039;s private site","isPartOf":{"@id":"https:\/\/www.pcjv.de\/#website"},"datePublished":"2026-07-11T08:00:00+00:00","dateModified":"2026-07-24T15:28:12+00:00","author":{"@id":"https:\/\/www.pcjv.de\/#\/schema\/person\/79b654f8c2fb5bf9405ccc4cb1c11880"},"breadcrumb":{"@id":"https:\/\/www.pcjv.de\/?p=1980#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.pcjv.de\/?p=1980"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.pcjv.de\/?p=1980#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.pcjv.de\/"},{"@type":"ListItem","position":2,"name":"gll-tools: measurement, modernized"}]},{"@type":"WebSite","@id":"https:\/\/www.pcjv.de\/#website","url":"https:\/\/www.pcjv.de\/","name":"Christian&#039;s private site","description":"Private site of Christian-W. Budde","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.pcjv.de\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/www.pcjv.de\/#\/schema\/person\/79b654f8c2fb5bf9405ccc4cb1c11880","name":"Christian","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/009d545df1a458e74ec172fa5dc19428c1144c2ee8f1ec82d94c3b28f12a0c14?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/009d545df1a458e74ec172fa5dc19428c1144c2ee8f1ec82d94c3b28f12a0c14?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/009d545df1a458e74ec172fa5dc19428c1144c2ee8f1ec82d94c3b28f12a0c14?s=96&d=mm&r=g","caption":"Christian"},"sameAs":["http:\/\/www.savioursofsoul.de\/Christian"],"url":"https:\/\/www.pcjv.de\/?author=3"}]}},"_links":{"self":[{"href":"https:\/\/www.pcjv.de\/index.php?rest_route=\/wp\/v2\/posts\/1980","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pcjv.de\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pcjv.de\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pcjv.de\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pcjv.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1980"}],"version-history":[{"count":1,"href":"https:\/\/www.pcjv.de\/index.php?rest_route=\/wp\/v2\/posts\/1980\/revisions"}],"predecessor-version":[{"id":2113,"href":"https:\/\/www.pcjv.de\/index.php?rest_route=\/wp\/v2\/posts\/1980\/revisions\/2113"}],"wp:attachment":[{"href":"https:\/\/www.pcjv.de\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1980"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pcjv.de\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1980"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pcjv.de\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1980"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}