{"version":"1.0","provider_name":"Klaviano Blog","provider_url":"https:\/\/www.klaviano.com\/piano-blog","author_name":"Mathilde","author_url":"https:\/\/www.klaviano.com\/piano-blog\/author\/blogadmin","title":"Podw\u00f3jna klawiatura fortepianu\u2026 o co w tym chodzi? - Klaviano Blog","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"vD4SQf9rzE\"><a href=\"https:\/\/www.klaviano.com\/piano-blog\/pl\/podwojna-klawiatura-fortepianu.html\">Podw\u00f3jna klawiatura fortepianu\u2026 o co w tym chodzi?<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/www.klaviano.com\/piano-blog\/pl\/podwojna-klawiatura-fortepianu.html\/embed#?secret=vD4SQf9rzE\" width=\"600\" height=\"338\" title=\"&#8222;Podw\u00f3jna klawiatura fortepianu\u2026 o co w tym chodzi?&#8221; &#8212; Klaviano Blog\" data-secret=\"vD4SQf9rzE\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/www.klaviano.com\/piano-blog\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","thumbnail_url":"https:\/\/www.klaviano.com\/piano-blog\/wp-content\/uploads\/2021\/01\/double-keyboard-1.jpg","thumbnail_width":1600,"thumbnail_height":1067,"description":"Czy s\u0142ysza\u0142e\u015b kiedy\u015b o fortepianie posiadaj\u0105cym podw\u00f3jn\u0105 klawiatur\u0119? Chcia\u0142by\u015b dowiedzie\u0107 si\u0119 w jakim celu stworzono taki instrument? Ju\u017c wszystko wyja\u015bniamy!&nbsp; System zosta\u0142 wynaleziony przez Emanuela Moor\u2019a w latach 20. i 30. ubieg\u0142ego wieku. W instrumencie tego typu, fragmenty oktawy roz\u0142o\u017cone s\u0105 pomi\u0119dzy dwoma klawiaturami i teoretycznie uk\u0142ad klawiszy u\u0142atwia granie &hellip;"}