1.0PianoNotes Onlinehttps://pianonotes.piano4u.comrich600338<blockquote class="wp-embedded-content" data-secret="bEd95Bhkya"><a href="https://pianonotes.piano4u.com/index.php/2012/04/franz-joseph-hayden-1732-1809/">Franz Joseph Haydn</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://pianonotes.piano4u.com/index.php/2012/04/franz-joseph-hayden-1732-1809/embed/#?secret=bEd95Bhkya" width="600" height="338" title="“Franz Joseph Haydn” — PianoNotes Online" data-secret="bEd95Bhkya" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script type="text/javascript"> /* <![CDATA[ */ /*! This file is auto-generated */ !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); //# sourceURL=https://pianonotes.piano4u.com/wp-includes/js/wp-embed.min.js /* ]]> */ </script> https://pianonotes.piano4u.com/wp-content/uploads/2012/03/Untitled-1.jpg1800900Franz Joseph Haydn is the composer who, more than any other, epitomizes the aims and achievements of the Classical era. Perhaps his most important achievement was that he developed and evolved in countless subtle ways the most influential structural principle in the history of music: his perfection of the set of expectations known as sonata form made an epochal impact. In hundreds of instrumental sonatas, string quartets, and symphonies, Haydn […]