All the good music player bookmarklets have disappeared in a cloud of 404 errors, so I made my own simple version with no dependencies. Lets see if I can host it here:

','',function(){d.paused?(d.play(),f=setInterval(function(){n()},100)):(d.pause(),clearInterval(f));return!1});q.appendChild(s);var y=p('button','','>|','',function(){e++;l()});q.appendChild(y);var z=p('ul','width:300px;background:grey;position:absolute;bottom:100%;right:0;margin:0;','','','');q.appendChild(z);for(g in c){var A=decodeURIComponent(c[g].rel="nofollow noopener" target="_blank" href),B=p('li','',A.substring(A.lastIndexOf('/')+1),g,function(){e=parseInt(this.getAttribute('data'));l()});z.appendChild(B)} var m=p('div','position: absolute;bottom: 0;white-space: nowrap;height: 50%;background: skyblue;border-right:9999px solid grey;','','',function(b){x=b.clientX;x/=document.width;d.currentTime=d.duration*x});q.appendChild(m);function n(){m.style.width=100*(d.currentTime/d.duration)+'%'}d=new Audio;l(); })();">Music Bookmarklet

If it isnt working quite right, then replace the URL of the bookmark with this:

javascript:(function(){var a=document.links,c=[],d,e=0,f,g;for(g in a){var h=a[g].toString().toUpperCase();-1==h.indexOf('.MP3')&&-1==h.indexOf('.OGG')&&-1==h.indexOf('.WAV')||c.push(a[g])}function l(){d.pause();d=new Audio(c[e]);d.play();d.addEventListener('ended',function(){e++;l()},!1);m.innerHTML='';var b=decodeURIComponent(c[e].rel="nofollow noopener" target="_blank" href);m.appendChild(document.createTextNode(b.substring(b.lastIndexOf('/')+1)));f=setInterval(function(){n()},100)} function p(b,t,u,v,w){b=document.createElement(b);var k=document.createAttribute('style');k.value=t;b.setAttributeNode(k);k=document.createAttribute('data');k.value=v;b.setAttributeNode(k);b.appendChild(document.createTextNode(u));b.onclick=w;return b}var q=p('div','display:block;background:grey;position:fixed;bottom:0;left:0;height:50px;width:100%','','','');document.body.appendChild(q);var r=p('button','','|<','',function(){e--;l()});q.appendChild(r); var s=p('button','','>','',function(){d.paused?(d.play(),f=setInterval(function(){n()},100)):(d.pause(),clearInterval(f));return!1});q.appendChild(s);var y=p('button','','>|','',function(){e++;l()});q.appendChild(y);var z=p('ul','width:300px;background:grey;position:absolute;bottom:100%;right:0;margin:0;','','','');q.appendChild(z);for(g in c){var A=decodeURIComponent(c[g].rel="nofollow noopener" target="_blank" href),B=p('li','',A.substring(A.lastIndexOf('/')+1),g,function(){e=parseInt(this.getAttribute('data'));l()});z.appendChild(B)} var m=p('div','position: absolute;bottom: 0;white-space: nowrap;height: 50%;background: skyblue;border-right:9999px solid grey;','','',function(b){x=b.clientX;x/=document.width;d.currentTime=d.duration*x});q.appendChild(m);function n(){m.style.width=100*(d.currentTime/d.duration)+'%'}d=new Audio;l(); })();

Find music to try it out here.