text: jsPsych.plugins['audio-slider-response'] = (function() {
  	var plugin = {};
  
  	jsPsych.pluginAPI.registerPreload('audio-slider-response', 'stimulus', 'audio');
  
  	plugin.info = {
  		name: 'audio-slider-response',
  		description: '',
      parameters: {
        stimulus: {
          type: jsPsych.plugins.parameterType.AUDIO,
          pretty_name: 'Stimulus',
          default: undefined,
          description: 'The image to be displayed'
        },
        min: {
          type: jsPsych.plugins.parameterType.INT,
          pretty_name: 'Min slider',
          default: 0,
          description: 'Sets the minimum value of the slider.'
        },
        max: {
          type: jsPsych.plugins.parameterType.INT,
          pretty_name: 'Max slider',
          default: 100,
          description: 'Sets the maximum value of the slider',
        },
  			start: {
  				type: jsPsych.plugins.parameterType.INT,
  				pretty_name: 'Slider starting value',
  				default: 50,
  				description: 'Sets the starting value of the slider',
  			},
        step: {
          type: jsPsych.plugins.parameterType.INT,
          pretty_name: 'Step',
          default: 1,
          description: 'Sets the step of the slider'
        },
        labels: {
          type: jsPsych.plugins.parameterType.HTML_STRING,
          pretty_name:'Labels',
          default: [],
          array: true,
          description: 'Labels of the slider.',
        },
        slider_width: {
          type: jsPsych.plugins.parameterType.INT,
          pretty_name:'Slider width',
          default: null,
          description: 'Width of the slider in pixels.'
        },
        button_label: {
          type: jsPsych.plugins.parameterType.STRING,
          pretty_name: 'Button label',
          default: 'Continue',
          array: false,
          description: 'Label of the button to advance.'
        },
        require_movement: {
          type: jsPsych.plugins.parameterType.BOOL,
          pretty_name: 'Require movement',
          default: false,
          description: 'If true, the participant will have to move the slider before continuing.'
        },
        prompt: {
          type: jsPsych.plugins.parameterType.STRING,
          pretty_name: 'Prompt',
          default: null,
          description: 'Any content here will be displayed below the slider.'
        },
        trial_duration: {
          type: jsPsych.plugins.parameterType.INT,
          pretty_name: 'Trial duration',
          default: null,
          description: 'How long to show the trial.'
        },
        response_ends_trial: {
          type: jsPsych.plugins.parameterType.BOOL,
          pretty_name: 'Response ends trial',
          default: true,
          description: 'If true, trial will end when user makes a response.'
        },
      }
    }
  
    plugin.trial = function(display_element, trial) {
  
      // setup stimulus
      var context = jsPsych.pluginAPI.audioContext();
      if(context !== null){
        var source = context.createBufferSource();
        source.buffer = jsPsych.pluginAPI.getAudioBuffer(trial.stimulus);
        source.connect(context.destination);
      } else {
        var audio = jsPsych.pluginAPI.getAudioBuffer(trial.stimulus);
        audio.currentTime = 0;
      }
  
      // set up end event if trial needs it
      if(trial.trial_ends_after_audio){
        if(context !== null){
          source.onended = function() {
            end_trial();
          }
        } else {
          audio.addEventListener('ended', end_trial);
        }
      }
  
      var html = '<div id="jspsych-audio-slider-response-wrapper" style="margin: 100px 0px;">';
    	html += '<div class="jspsych-audio-slider-response-container" style="position:relative; margin: 0 auto 3em auto; ';
      if(trial.slider_width !== null){
        html += 'width:'+trial.slider_width+'px;';
      }
      html += '">';
      html += '<input type="range" value="'+trial.start+'" min="'+trial.min+'" max="'+trial.max+'" step="'+trial.step+'" style="width: 100%;" id="jspsych-audio-slider-response-response"></input>';
      html += '<div>'
      for(var j=0; j < trial.labels.length; j++){
        var width = 100/(trial.labels.length-1);
        var left_offset = (j * (100 /(trial.labels.length - 1))) - (width/2);
        html += '<div style="display: inline-block; position: absolute; left:'+left_offset+'%; text-align: center; width: '+width+'%;">';
        html += '<span style="text-align: center; font-size: 80%;">'+trial.labels[j]+'</span>';
        html += '</div>'
      }
      html += '</div>';
      html += '</div>';
      html += '</div>';
  
  		if (trial.prompt !== null){
  	    html += trial.prompt;
  		}
  
      // add submit button
      html += '<button id="jspsych-audio-slider-response-next" class="jspsych-btn" '+ (trial.require_movement ? "disabled" : "") + '>'+trial.button_label+'</button>';
  
      display_element.innerHTML = html;
  
      var response = {
        rt: null,
        response: null
      };
  
      if(trial.require_movement){
        display_element.querySelector('#jspsych-audio-slider-response-response').addEventListener('change', function(){
          display_element.querySelector('#jspsych-audio-slider-response-next').disabled = false;
        })
      }
  
      display_element.querySelector('#jspsych-audio-slider-response-next').addEventListener('click', function() {
        // measure response time
        var endTime = performance.now();
  			var rt = endTime - startTime;
  			if(context !== null){
  				endTime = context.currentTime;
  				rt = Math.round((endTime - startTime) * 1000);
  			}
        response.rt = rt;
        response.response = display_element.querySelector('#jspsych-audio-slider-response-response').value;
  
        if(trial.response_ends_trial){
          end_trial();
        } else {
          display_element.querySelector('#jspsych-audio-slider-response-next').disabled = true;
        }
  
      });
  
      function end_trial(){
  
        jsPsych.pluginAPI.clearAllTimeouts();
  
  			if(context !== null){
          source.stop();
          source.onended = function() { }
        } else {
          audio.pause();
          audio.removeEventListener('ended', end_trial);
        }
  
        // save data
        var trialdata = {
          "rt": response.rt,
  				"stimulus": trial.stimulus,
          "response": response.response
        };
  
        display_element.innerHTML = '';
  
        // next trial
        jsPsych.finishTrial(trialdata);
      }
  
  		var startTime = performance.now();
  		// start audio
      if(context !== null){
        startTime = context.currentTime;
        source.start(startTime);
      } else {
        audio.play();
      }
  
      // end trial if trial_duration is set
      if (trial.trial_duration !== null) {
        jsPsych.pluginAPI.setTimeout(function() {
          end_trial();
        }, trial.trial_duration);
      }
  
  
    };
  
    return plugin;
  })();
  