+ <div><label>Master</label> <input id="master-gain" type="range" min="0" max="127" value="127"></div>
+ <br>
+ <div><label>Delay</label> <input id="delay" type="range" min="0" max="5" value="0" step="0.1"></div>
+ <div><label>Feedback</label> <input id="feedback" type="range" min="0" max="1" value="0.8" step="0.1"></div>
+ <div><label>Filter</label> <input id="filter" type="range" min="0" max="5000" value="1000" step="100"></div>