{"id":1479,"date":"2024-11-20T21:17:22","date_gmt":"2024-11-20T21:17:22","guid":{"rendered":"https:\/\/rmlfx.com\/?p=1479"},"modified":"2025-04-06T02:29:27","modified_gmt":"2025-04-06T02:29:27","slug":"gpi-guitar-pedal-interface","status":"publish","type":"post","link":"https:\/\/rmlfx.com\/gpi-guitar-pedal-interface\/","title":{"rendered":"GPI (Guitar Pedal Interface)"},"content":{"rendered":"\n<h4 class=\"wp-block-heading eplus-8yP4So\">RML Guitar Pedal Interface<\/h4>\n\n\n<div class=\"wp-block-image eplus-bxaBhb\">\n<figure class=\"alignright\"><a href=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?ssl=1\"><img data-recalc-dims=\"1\" fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=300%2C300&#038;ssl=1\" alt=\"\" class=\"wp-image-1489\" srcset=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=100%2C100&amp;ssl=1 100w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=600%2C600&amp;ssl=1 600w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=70%2C70&amp;ssl=1 70w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?resize=75%2C75&amp;ssl=1 75w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIfull.png?w=1200&amp;ssl=1 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p class=\"eplus-NRAKu6\">G<strong>PI eurorack&nbsp;<\/strong>(PCB panel) $99<\/p>\n\n\n\n<p class=\"eplus-NRAKu6\"><strong>GPI eurorack&nbsp;<\/strong>B-stock PCB Panel $85<lb><br><strong>Domestic US Shipping:<\/strong><\/lb> FREE. <\/p>\n\n\n\n<p class=\"eplus-BLvlwp\">Only available with the PCB Panel. I&#8217;ll post some updated photos when the new batch arrives.<\/p>\n<p class=\"eplus-BLvlwp\">When evaluating the price please understand the cost factors in shipping which can cost us about $12 +\/- \u00a0for priority 3 day domestically.\u00a0<\/p>\n\n\n\n<form action=\"https:\/\/www.paypal.com\/cgi-bin\/webscr\" method=\"post\" target=\"_top\">\n  <input type=\"hidden\" name=\"cmd\" value=\"_s-xclick\" \/>\n  <input type=\"hidden\" name=\"hosted_button_id\" value=\"P6LA7GBT5H3VY\" \/>\n  <table>\n    <tr>\n      <td>\n        <input type=\"hidden\" name=\"on0\" value=\"Options:\"\/>\n        Options:\n      <\/td>\n    <\/tr>\n    <tr>\n      <td>\n        <select name=\"os0\">\n          <option value=\"Black PCB panel\">\n            Black PCB panel $99.00 USD\n          <\/option>\n          <option value=\"Black PCB panel (B-Stock)\">\n            Black PCB panel (B-Stock) $85.00 USD\n          <\/option>\n        <\/select>\n      <\/td>\n    <\/tr>\n  <\/table>\n  <input type=\"hidden\" name=\"currency_code\" value=\"USD\" \/>\n  <input type=\"image\" src=\"https:\/\/www.paypalobjects.com\/en_US\/i\/btn\/btn_buynowCC_LG.gif\" border=\"0\" name=\"submit\" title=\"PayPal - The safer, easier way to pay online!\" alt=\"Buy Now\" \/>\n<\/form>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading eplus-gZMs2X\">About the GPI eurorack module<\/h3>\n\n\n\n<p class=\"eplus-Y3jc9J\"><\/p>\n\n\n<div class=\"wp-block-image eplus-GCuG3Q\">\n<figure class=\"alignright\"><a href=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?ssl=1\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"300\" height=\"300\" src=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=300%2C300&#038;ssl=1\" alt=\"\" class=\"wp-image-1486\" srcset=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=300%2C300&amp;ssl=1 300w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=100%2C100&amp;ssl=1 100w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=600%2C600&amp;ssl=1 600w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=768%2C768&amp;ssl=1 768w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=1024%2C1024&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=70%2C70&amp;ssl=1 70w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?resize=75%2C75&amp;ssl=1 75w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIbottom.png?w=1200&amp;ssl=1 1200w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p class=\"eplus-FYKzLZ\"><strong>The RML &#8220;GPI&#8221; or (Guitar Pedal Interface)<\/strong> is designed to bridge guitar pedal world with modular synth world. An 8HP eurorack unit with two attenuators for sending a reduced signal to guitar pedals for better dynamic response&nbsp;and two pre-amps that boost that lower volume signal (from guitar pedal) back to eurorack levels. Each pre-amp splits the output signal into two patchable outs for creative routing options into other modules.<\/p>\n\n\n\n<p class=\"eplus-ACZ1JY\">Power: 10.5mA+\/8.6mA-<br><\/p>\n\n\n\n<p class=\"eplus-bat4WY\"><iframe src=\"https:\/\/player.vimeo.com\/video\/380450622\" allow=\"autoplay; fullscreen\" allowfullscreen=\"\" width=\"540\" height=\"260\" frameborder=\"0\"><\/iframe><\/p>\n\n\n<p>[list_arrow]<\/p>\n<ul>\n<li>2 units per module allowing for use with stereo pedals.<\/li>\n<li>Use the pre-amps to boost other low level signals like line level gear. Outboard synths and drum machines.<\/li>\n<li>Use the attenuators to reduce control voltages being sent from other modules<\/li>\n<li>Plug your guitar right in to the GPI using 1\/4 to 1\/8 cables<\/li>\n<\/ul>\n<ul>\n<li>LEDs flash in response to the signal being boosted by the pre-amps. A good indicator on how hard your driving the signal.<\/li>\n<li>Very low power consumption.<\/li>\n<\/ul>\n<p>[\/list_arrow]<\/p>\n\n\n<div class=\"wp-block-image eplus-0I0xGe\">\n<figure class=\"alignright\"><a href=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?ssl=1\"><img data-recalc-dims=\"1\" decoding=\"async\" width=\"300\" height=\"298\" src=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=300%2C298&#038;ssl=1\" alt=\"\" class=\"wp-image-1496\" srcset=\"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=300%2C298&amp;ssl=1 300w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=100%2C100&amp;ssl=1 100w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=600%2C596&amp;ssl=1 600w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=150%2C150&amp;ssl=1 150w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=768%2C762&amp;ssl=1 768w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=1024%2C1016&amp;ssl=1 1024w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=70%2C70&amp;ssl=1 70w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=151%2C150&amp;ssl=1 151w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?resize=75%2C75&amp;ssl=1 75w, https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2017\/05\/GPIracked-1.png?w=1600&amp;ssl=1 1600w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><\/figure>\n<\/div>\n\n\n<p class=\"eplus-lU1kX9\">A couple of random thought on the design:<br>There are many &#8220;Send and Return&#8221; modules available, all mono. With this one I wanted to make something available that could handle stereo pedals (or line level gear) without having to buy multiple units. Along the way I decided that having 1\/4&#8243; cables hanging off the eurorack seemed bulky and cumbersome so I went with 1\/8 (3.5mm) jacks. 1\/4 to 1\/8 cables have the same construction as&nbsp;eurorack cables and can be found at places like <a href=\"http:\/\/www.perfectcircuitaudio.com\">Perfect Circuit Audio<\/a> at a very affordable prices.<\/p>\n\n\n\n<p class=\"eplus-VRTcvS\">After building the first prototype I quickly found that just using the&nbsp;pre-amp worked great for boosting the Buchla audio level up to normal levels compared to&nbsp;my DPO and Lifeforms. Routing my Moog though the attenuation and into the pre-amp worked like a charm. Having this simple but versatile tool in my rack has definitely been enjoyable. Not only can I now use all those old guitar pedals with my system, but external keyboards I hadn&#8217;t considered are now an option.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>RML Guitar Pedal Interface GPI eurorack&nbsp;(PCB panel) $99 GPI eurorack&nbsp;B-stock PCB Panel $85Domestic US Shipping: FREE. Only available with the PCB Panel. I&#8217;ll post some updated photos when the new batch arrives. When evaluating the price please understand the cost factors in shipping which can cost us about $12 +\/- \u00a0for priority 3 day domestically.\u00a0 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":4950,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[2,57],"tags":[],"class_list":["post-1479","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-available","category-eurorack"],"acf":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/rmlfx.com\/wp-content\/uploads\/2023\/09\/GPI-Stamp2.jpg?fit=960%2C640&ssl=1","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/posts\/1479","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/comments?post=1479"}],"version-history":[{"count":3,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/posts\/1479\/revisions"}],"predecessor-version":[{"id":5419,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/posts\/1479\/revisions\/5419"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/media\/4950"}],"wp:attachment":[{"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/media?parent=1479"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/categories?post=1479"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rmlfx.com\/wp-json\/wp\/v2\/tags?post=1479"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}