{"id":65,"date":"2008-01-09T19:29:50","date_gmt":"2008-01-10T01:29:50","guid":{"rendered":"http:\/\/www.muzique.com\/news\/?p=65"},"modified":"2016-01-05T13:02:09","modified_gmt":"2016-01-05T19:02:09","slug":"bandpass-eq-filter","status":"publish","type":"post","link":"http:\/\/www.muzique.com\/news\/bandpass-eq-filter\/","title":{"rendered":"Bandpass EQ Filter"},"content":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.muzique.com\/news\/images\/gyrator.gif\" alt=\"gyrator circuits\" align=\"left\" border=\"0\" height=\"220\" hspace=\"12\" vspace=\"0\" width=\"210\" \/>An LC filter is useful in forming a bandpass EQ, and often a gyrator circuit is used in place of the inductor to reduce costs and save space.<\/p>\n<p>Gyrator bandpass filters are found in tone controls or as frequency shapers in &#8220;metal&#8221; pedals.<\/p>\n<p>I have programmed a calculator to  make it easy to find the center of the passband of the filter.<\/p>\n<p>It can be accessed from the <a href=\"http:\/\/www.muzique.com\/lab\/main.htm\" title=\"AMZ Lab Notebook\" target=\"_blank\">AMZ Lab Notebook<\/a> or by this <a href=\"http:\/\/www.muzique.com\/lab\/gyrator.htm\" title=\"Bandpass filter calculator\" target=\"_blank\">direct link<\/a>.<\/p>\n<p>Can you find the gyrator filters in <a href=\"http:\/\/www.muzique.com\/news\/images\/FX56.jpg\" title=\"EQ pedal\" target=\"_blank\">this pedal<\/a>?<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An LC filter is useful in forming a bandpass EQ, and often a gyrator circuit is used in place of the inductor to reduce costs and save space. Gyrator bandpass filters are found in tone controls or as frequency shapers in &#8220;metal&#8221; pedals. I have programmed a calculator to make it easy to find the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-65","post","type-post","status-publish","format-standard","hentry","category-diy"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Bandpass EQ Filter - AMZ-FX Guitar Effects Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.muzique.com\/news\/bandpass-eq-filter\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Bandpass EQ Filter - AMZ-FX Guitar Effects Blog\" \/>\n<meta property=\"og:description\" content=\"An LC filter is useful in forming a bandpass EQ, and often a gyrator circuit is used in place of the inductor to reduce costs and save space. Gyrator bandpass filters are found in tone controls or as frequency shapers in &#8220;metal&#8221; pedals. I have programmed a calculator to make it easy to find the [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"http:\/\/www.muzique.com\/news\/bandpass-eq-filter\/\" \/>\n<meta property=\"og:site_name\" content=\"AMZ-FX Guitar Effects Blog\" \/>\n<meta property=\"article:published_time\" content=\"2008-01-10T01:29:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2016-01-05T19:02:09+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/www.muzique.com\/news\/images\/gyrator.gif\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@AmzFx\" \/>\n<meta name=\"twitter:site\" content=\"@AmzFx\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/bandpass-eq-filter\\\/#article\",\"isPartOf\":{\"@id\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/bandpass-eq-filter\\\/\"},\"author\":{\"name\":\"admin\",\"@id\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/#\\\/schema\\\/person\\\/2ff886e309b4cfdd0bc718b43770df73\"},\"headline\":\"Bandpass EQ Filter\",\"datePublished\":\"2008-01-10T01:29:50+00:00\",\"dateModified\":\"2016-01-05T19:02:09+00:00\",\"mainEntityOfPage\":{\"@id\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/bandpass-eq-filter\\\/\"},\"wordCount\":88,\"image\":{\"@id\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/bandpass-eq-filter\\\/#primaryimage\"},\"thumbnailUrl\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/images\\\/gyrator.gif\",\"articleSection\":[\"DIY\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/bandpass-eq-filter\\\/\",\"url\":\"http:\\\/\\\/www.muzique.com\\\/news\\\/bandpass-eq-filter\\\/\",\"name\":\"Bandpass EQ Filter - 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