{"id":380,"date":"2017-12-12T23:38:29","date_gmt":"2017-12-13T04:38:29","guid":{"rendered":"http:\/\/magneticpiano.com\/?page_id=380"},"modified":"2017-12-27T10:33:25","modified_gmt":"2017-12-27T15:33:25","slug":"ircam-phase-1a","status":"publish","type":"page","link":"http:\/\/magneticpiano.com\/?page_id=380","title":{"rendered":"Phase 1a-Measurement"},"content":{"rendered":"<h3>Measurement and Testing of the Physical Response of an Electromagnetically-Prepared piano<\/h3>\n<p>The goal of this phase was to gather information about the physical effects of induction by taking measurements in various controlled environments.<\/p>\n<p>I first set a single electromagnet over a custom-built monochord fitted with a single piano string. The monochord was essentially large bracket, extending about 3 feet from bridge to bridge. This bracket was locked down to reduce sympathetic vibrations. Various simple audio signals were sent through the electromagnet, and the resulting string sounds recorded with a single condenser microphone.<\/p>\n<div id=\"attachment_295\" style=\"width: 565px\" class=\"wp-caption aligncenter\"><img aria-describedby=\"caption-attachment-295\" decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-295\" src=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0507.jpg\" alt=\"IMG_0507\" width=\"555\" height=\"416\" srcset=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0507.jpg 3264w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0507-450x337.jpg 450w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0507-1024x768.jpg 1024w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0507-268x200.jpg 268w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0507-700x525.jpg 700w\" sizes=\"(max-width: 555px) 100vw, 555px\" \/><p id=\"caption-attachment-295\" class=\"wp-caption-text\">The monochord setup<\/p><\/div>\n<div id=\"attachment_297\" style=\"width: 569px\" class=\"wp-caption aligncenter\"><img aria-describedby=\"caption-attachment-297\" decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-297\" src=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0509.jpg\" alt=\"IMG_0509\" width=\"559\" height=\"745\" srcset=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0509.jpg 2448w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0509-337x450.jpg 337w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0509-768x1024.jpg 768w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0509-700x933.jpg 700w\" sizes=\"(max-width: 559px) 100vw, 559px\" \/><p id=\"caption-attachment-297\" class=\"wp-caption-text\">Taking strobe measurements<\/p><\/div>\n<p>The next set of measurements involved the full device, set up in a grand piano in one of IRCAM\u2019s project studios. Again, various simple sounds were sent through the electromagnets. I first sent these sounds through all 12 electromagnets simultaneously \u2013 this wasn\u2019t particularly useful for testing purposes, but it sounded interesting so I wanted recordings. Next, the same set of audio signals was sent through individual electromagnets placed over several different pitches (medium, low, and very low ranges). In each case the resulting string sounds were recorded with 4 microphones &#8211; a stereo pair of condensers set near the open lid, a single condenser set over the activated string, and a contact mic attached to the top of the soundboard.<\/p>\n<div id=\"attachment_282\" style=\"width: 619px\" class=\"wp-caption aligncenter\"><img aria-describedby=\"caption-attachment-282\" decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-282\" src=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0381.jpg\" alt=\"IMG_0381\" width=\"609\" height=\"457\" srcset=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0381.jpg 3264w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0381-450x337.jpg 450w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0381-1024x768.jpg 1024w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0381-268x200.jpg 268w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0381-700x525.jpg 700w\" sizes=\"(max-width: 609px) 100vw, 609px\" \/><p id=\"caption-attachment-282\" class=\"wp-caption-text\">The testing setup in a grand piano<\/p><\/div>\n<div id=\"attachment_289\" style=\"width: 620px\" class=\"wp-caption aligncenter\"><img aria-describedby=\"caption-attachment-289\" decoding=\"async\" loading=\"lazy\" class=\"alignnone wp-image-289\" src=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0388.jpg\" alt=\"IMG_0388\" width=\"610\" height=\"457\" srcset=\"http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0388.jpg 3264w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0388-450x337.jpg 450w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0388-1024x768.jpg 1024w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0388-268x200.jpg 268w, http:\/\/magneticpiano.com\/wp-content\/uploads\/2013\/10\/IMG_0388-700x525.jpg 700w\" sizes=\"(max-width: 610px) 100vw, 610px\" \/><p id=\"caption-attachment-289\" class=\"wp-caption-text\">A good view of the mic placement (the contact mic is in a sound hole)<\/p><\/div>\n<p>I have selected some of the more sonically interesting results from these piano tests and posted them in the <a href=\"http:\/\/magneticpiano.com\/?page_id=352\">Audio Examples 2<\/a> page.<\/p>\n<p>The resulting measurements were used by Jo\u00ebl Bensoam as he developed his induction algorithm. We hope to soon co-author a paper detailing his results.<\/p>\n<p>Continue on to <a href=\"http:\/\/magneticpiano.com\/?page_id=384\">Phase 1b &#8211; Modalys piano<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Measurement and Testing of the Physical Response of an Electromagnetically-Prepared piano The goal of this phase was to gather information about the physical effects of induction by taking measurements in various controlled environments. I first set a single electromagnet over a custom-built monochord fitted with a single piano string. The &#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":46,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-full-width.php","meta":{"jetpack_post_was_ever_published":false},"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/P41WFm-68","_links":{"self":[{"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/pages\/380"}],"collection":[{"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/magneticpiano.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=380"}],"version-history":[{"count":18,"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/pages\/380\/revisions"}],"predecessor-version":[{"id":513,"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/pages\/380\/revisions\/513"}],"up":[{"embeddable":true,"href":"http:\/\/magneticpiano.com\/index.php?rest_route=\/wp\/v2\/pages\/46"}],"wp:attachment":[{"href":"http:\/\/magneticpiano.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}