diff --git a/app/experiment/templates/experiment_statistics.html b/app/experiment/templates/experiment_statistics.html
index 20543144aff734ffef78da95aaedbff1a70df4ad..76b2e9edb2a6f0a0afcc6a6cbf341090860e6415 100644
--- a/app/experiment/templates/experiment_statistics.html
+++ b/app/experiment/templates/experiment_statistics.html
@@ -45,15 +45,17 @@
         </button>
 
         <div id="export-link-container" class="hidden">
-          <a id="export-link" class="float-right" href="{{ url_for('experiment.download_csv', exp_id=exp.idexperiment) }}" role="button"></a>
+          <a id="export-link" class="float-right"
+            href="{{ url_for('experiment.download_csv', exp_id=exp.idexperiment) }}" role="button"></a>
           <p id="export-error"></p>
         </div>
 
 
-      <div class="progress hidden">
-        <div id="export-results-bar" class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
+        <div class="progress hidden">
+          <div id="export-results-bar" class="progress-bar progress-bar-striped progress-bar-animated"
+            role="progressbar" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
+          </div>
         </div>
-      </div>
 
       </td>
     </tr>
@@ -67,21 +69,21 @@
 <table class="table">
   <thead>
     <tr>
-    <th scope="col" nowrap>Question ID:</td>
-    <th scope="col" nowrap>Question:</th>
-    <th scope="col" nowrap>Left scale</th>
-    <th scope="col" nowrap>Right scale</th>
+      <th scope="col" nowrap>Question ID:</td>
+      <th scope="col" nowrap>Question:</th>
+      <th scope="col" nowrap>Left scale</th>
+      <th scope="col" nowrap>Right scale</th>
     </tr>
   </thead>
   <tbody>
-    {% for q in question_headers %}    
+    {% for q in question_headers %}
     <tr>
-    <td>{{ q.idquestion }}</td>
-    <td>{{ q.question }}</td>
-    <td>{{ q.left }}</td>
-    <td>{{ q.right }}</td>
+      <td>{{ q.idquestion }}</td>
+      <td>{{ q.question }}</td>
+      <td>{{ q.left }}</td>
+      <td>{{ q.right }}</td>
     </tr>
-    {% endfor %}    
+    {% endfor %}
   </tbody>
 </table>
 
@@ -92,29 +94,29 @@
 
 <table class="table">
   <thead>
-      
+
     <tr>
-     <th scope="col" nowrap>Participant ID:</th>
-     {% for page in pages_and_questions %}
-     
-            {% for p in pages_and_questions[page] %}
-             <th scope="col" nowrap>{{ p[0]}}/{{ p[1]}}</th>
-            {% endfor %}
-
-     {% endfor %}
+      <th scope="col" nowrap>Participant ID:</th>
+      {% for page in pages_and_questions %}
+
+      {% for p in pages_and_questions[page] %}
+      <th scope="col" nowrap>{{ p[0]}}/{{ p[1]}}</th>
+      {% endfor %}
+
+      {% endfor %}
     </tr>
   </thead>
   <tbody>
-    {% for participant in participants_and_answers %}    
+    {% for participant in participants_and_answers %}
     <tr>
-	{% if participant == 'mean' %}
-        <td><b>{{ participant }}</b></td>
-	{% else  %}
-        <td>{{ participant }}</td>
-	{% endif  %}
-        {% for answer in participants_and_answers[participant] %}
-            <td>{{ answer }}</td>
-        {% endfor %}
+      {% if participant == 'mean' %}
+      <td><b>{{ participant }}</b></td>
+      {% else  %}
+      <td>{{ participant }}</td>
+      {% endif  %}
+      {% for answer in participants_and_answers[participant] %}
+      <td>{{ answer }}</td>
+      {% endfor %}
     </tr>
     {% endfor %}
 
@@ -127,56 +129,60 @@
 <table class="table">
   <thead>
     <tr>
-    <th style="width:25%;%" scope="col" nowrap>Stimulus:</td>
-    <th style="width:25%;%" scope="col" nowrap>Picture:</th>
-    <th style="width:25%;%" scope="col" nowrap>Description:</th>
-    <th style="width:25%;%" scope="col" nowrap></th>
+      <th style="width:25%;%" scope="col" nowrap>Stimulus:</td>
+      <th style="width:25%;%" scope="col" nowrap>Picture:</th>
+      <th style="width:25%;%" scope="col" nowrap>Description:</th>
+      <th style="width:25%;%" scope="col" nowrap></th>
     </tr>
   </thead>
   <tbody>
-    {% for s in stimulus_headers %}    
-      {% for embody_picture in embody_questions %}
-        <tr>
-
-          {% if s.type == 'text' %}
-            <td>{{ s.text }}</td>
-          {% elif s.type == 'picture' %}
-            <td><img src="/{{ s.media }}" class="thumbnail" /></td>
-          {% elif s.type == 'video' %}
-            <td>
-              <div class="embed-responsive embed-responsive-16by9 ">
-                  <iframe class="embed-responsive-item thumbnail" src="/{{ s.media }}" allowFullScreen></iframe>
-              </div>
-            </td>
-          {% elif s.type == 'audio' %}
-            <td>
-              <div class="embed-responsive embed-responsive-16by9 ">
-                  <iframe class="embed-responsive-item thumbnail" src="/{{ s.media }}" allowFullScreen></iframe>
-              </div>
-            </td>
-          {% else %}
-            <td>{{ s.text }}</td>
-          {% endif %}
-
-          <td><img src="{{ embody_picture.picture }}" class="thumbnail" /></td>
-          <td>{{ embody_picture.question }}</td>
-
-          <td>
-          <button data-value="{{ s.idpage }}-{{ embody_picture.idembody }}" class="btn btn-primary embody-get-drawing">
-            <span class="spinner-border spinner-border-sm hidden"></span>
-            Draw
-          </button>
-          </td>
-
-        </tr>
-      {% endfor %}    
-    {% endfor %}    
+    {% for s in stimulus_headers %}
+    {% for embody_picture in embody_questions %}
+    <tr>
+
+      {% if s.type == 'text' %}
+      <td>{{ s.text }}</td>
+      {% elif s.type == 'picture' %}
+      <td><img src="/{{ s.media }}" class="thumbnail" /></td>
+      {% elif s.type == 'video' %}
+      <td>
+        <div class="embed-responsive embed-responsive-16by9 ">
+          <iframe class="embed-responsive-item thumbnail" src="/{{ s.media }}" allowFullScreen></iframe>
+        </div>
+      </td>
+      {% elif s.type == 'audio' %}
+      <td>
+        <div class="embed-responsive embed-responsive-16by9 ">
+          <audio class="embed-responsive-item thumbnail" controls>
+            <source src="/{{ s.media }}">
+            Your browser does not support the audio element.
+          </audio>
+        </div>
+      </td>
+      {% else %}
+      <td>{{ s.text }}</td>
+      {% endif %}
+
+      <td><img src="{{ embody_picture.picture }}" class="thumbnail" /></td>
+      <td>{{ embody_picture.question }}</td>
+
+      <td>
+        <button data-value="{{ s.idpage }}-{{ embody_picture.idembody }}" class="btn btn-primary embody-get-drawing">
+          <span class="spinner-border spinner-border-sm hidden"></span>
+          Draw
+        </button>
+      </td>
+
+    </tr>
+    {% endfor %}
+    {% endfor %}
   </tbody>
 </table>
 
 
 <div class="progress hidden" id="plotted-image">
-  <div id="image-loading-progress" class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" aria-valuenow="50" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
+  <div id="image-loading-progress" class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar"
+    aria-valuenow="50" aria-valuemin="0" aria-valuemax="100" style="width: 0%">
     <!-- Creating image... -->
   </div>
 </div>
@@ -190,20 +196,20 @@
 <table class="table">
   <thead>
     <tr>
-     <th scope="col" nowrap>Participant</th>
-     
-     {% for bg in bg_questions %}
-     <th scope="col" nowrap>{{ bg.background_question }}</th>
-     {% endfor %}
+      <th scope="col" nowrap>Participant</th>
+
+      {% for bg in bg_questions %}
+      <th scope="col" nowrap>{{ bg.background_question }}</th>
+      {% endfor %}
     </tr>
   </thead>
   <tbody>
-    {% for p in bg_answers_for_participants %}    
+    {% for p in bg_answers_for_participants %}
     <tr>
-        <td>{{ p }}</td>
-        {% for bg_answer in bg_answers_for_participants[p] %}
-            <td align="center">{{ bg_answer }}</td>
-        {% endfor %}
+      <td>{{ p }}</td>
+      {% for bg_answer in bg_answers_for_participants[p] %}
+      <td align="center">{{ bg_answer }}</td>
+      {% endfor %}
     </tr>
     {% endfor %}
 
@@ -211,9 +217,9 @@
   </tbody>
 </table>
 
-<script src="{{ url_for('static', filename='lib/js/socket.io.js') }}" ></script>
-<script src="{{ url_for('static', filename='js/urls.js') }}" ></script>
-<script src="{{ url_for('static', filename='js/getDrawing.js') }}" ></script>
-<script src="{{ url_for('static', filename='js/getCSV.js') }}" ></script>
+<script src="{{ url_for('static', filename='lib/js/socket.io.js') }}"></script>
+<script src="{{ url_for('static', filename='js/urls.js') }}"></script>
+<script src="{{ url_for('static', filename='js/getDrawing.js') }}"></script>
+<script src="{{ url_for('static', filename='js/getCSV.js') }}"></script>
 
-{% endblock %}
+{% endblock %}
\ No newline at end of file
diff --git a/app/task/templates/task.html b/app/task/templates/task.html
index 9caa5513056fa067252de3f0fc11ef7456a6439f..1aafaeea4cae5afc73b768f1ab1a750dd7c7f0a4 100644
--- a/app/task/templates/task.html
+++ b/app/task/templates/task.html
@@ -3,123 +3,134 @@
 
 
 <div class="container stimulus">
-  <div class="row justify-content-center">
+    <div class="row justify-content-center">
 
-    {% if session['randomization']=='Off' %}
+        {% if session['randomization']=='Off' %}
 
         {% if session['type']=='text' %}
-            <div class="container text-center mt-5 pt-5">
-                {% for page in pages.items %}
-                <h{{ stimulus_size_text }} class="text-center mt-5"><br>{{ page.text }}</h{{ stimulus_size_text }}>
-                {% endfor %}
-            </div>
-            <br><br>
+        <div class="container text-center mt-5 pt-5">
+            {% for page in pages.items %}
+            <h{{ stimulus_size_text }} class="text-center mt-5"><br>{{ page.text }}</h{{ stimulus_size_text }}>
+            {% endfor %}
+        </div>
+        <br><br>
         {% endif %}
-        
+
         {% if session['type']=='picture' %}
-            <div class="stimulus col-{{stimulus_size}} mt-5 pt-5">
-                {% for page in pages.items %}
-                    <img src="/{{ page.media }}" class="img-fluid">
-                {% endfor %}
-            </div>
+        <div class="stimulus col-{{stimulus_size}} mt-5 pt-5">
+            {% for page in pages.items %}
+            <img src="/{{ page.media }}" class="img-fluid">
+            {% endfor %}
+        </div>
         {% endif %}
-        
+
         {% if session['type']=='video' %}
-            <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
-                {% for page in pages.items %}
-                    <div class="embed-responsive embed-responsive-16by9">
-                        <iframe class="embed-responsive-item" src="/{{ page.media }}" allowfullscreen></iframe>
-                    </div>
-                {% endfor %}
+        <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
+            {% for page in pages.items %}
+            <div class="embed-responsive embed-responsive-16by9">
+                <iframe class="embed-responsive-item" src="/{{ page.media }}" allowfullscreen></iframe>
             </div>
+            {% endfor %}
+        </div>
         {% endif %}
 
         {% if session['type']=='audio' %}
-            <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
-                {% for page in pages.items %}
-                    <div class="embed-responsive embed-responsive-16by9">
-                        <iframe class="embed-responsive-item" src="/{{ page.media }}" allowfullscreen></iframe>
-                    </div>
-                {% endfor %}
+        <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
+            {% for page in pages.items %}
+            <div class="embed-responsive embed-responsive-16by9">
+                <audio class="embed-responsive-item" controls>
+                    <source src="/{{ page.media }}">
+                    Your browser does not support the audio element.
+                </audio>
             </div>
+            {% endfor %}
+        </div>
         {% endif %}
 
-    {% else %}
+        {% else %}
 
         {% if session['type']=='text' %}
-            <div class="container text-center mt-5 pt-5">
-                {% for page in pages.items %}
-                <h{{ stimulus_size_text }} class="text-center mt-5"><br>{{ randomized_stimulus.text }}</h{{ stimulus_size_text }}>
-                {% endfor %}
-            </div>
-            <br><br>
+        <div class="container text-center mt-5 pt-5">
+            {% for page in pages.items %}
+            <h{{ stimulus_size_text }} class="text-center mt-5"><br>{{ randomized_stimulus.text }}
+            </h{{ stimulus_size_text }}>
+            {% endfor %}
+        </div>
+        <br><br>
         {% endif %}
-        
+
         {% if session['type']=='picture' %}
-            <div class="stimulus col-{{stimulus_size}} mt-5 pt-5">
-                {% for page in pages.items %}
-                    <img src="/{{ randomized_stimulus.media }}" class="img-fluid">
-                {% endfor %}
+        <div class="stimulus col-{{stimulus_size}} mt-5 pt-5">
+            {% for page in pages.items %}
+            <img src="/{{ randomized_stimulus.media }}" class="img-fluid">
+            {% endfor %}
 
 
-            </div>
+        </div>
         {% endif %}
-        
+
         {% if session['type']=='video' %}
-            <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
-                {% for page in pages.items %}
-                    <div class="embed-responsive embed-responsive-16by9">
-                        <iframe class="embed-responsive-item" src="/{{ randomized_stimulus.media }}" allowfullscreen></iframe>
-                    </div>
-                {% endfor %}
+        <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
+            {% for page in pages.items %}
+            <div class="embed-responsive embed-responsive-16by9">
+                <iframe class="embed-responsive-item" src="/{{ randomized_stimulus.media }}" allowfullscreen></iframe>
             </div>
+            {% endfor %}
+        </div>
         {% endif %}
 
         {% if session['type']=='audio' %}
-            <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
-                {% for page in pages.items %}
-                    <div class="embed-responsive embed-responsive-16by9">
-                        <iframe class="embed-responsive-item" src="/{{ randomized_stimulus.media }}" allowfullscreen></iframe>
-                    </div>
-                {% endfor %}
+        <div class="col-{{stimulus_size}} container stimulus mt-5 pt-5">
+            {% for page in pages.items %}
+            <div class="embed-responsive embed-responsive-16by9">
+                <audio class="embed-responsive-item" controls>
+                    <source src="/{{ randomized_stimulus.media }}">
+                    Your browser does not support the audio element.
+                </audio>
             </div>
+            {% endfor %}
+        </div>
         {% endif %}
 
-    {% endif %}
+        {% endif %}
 
-    {% if form.__name__ == 'embody' %} 
-      <div class="col-4 mt-5 pt-5">
-        <div class="canvas-container">
-            <span class="canvas-info"></span>
-            <canvas id="embody-canvas" class="crosshair" width="20" height="20" ></canvas>
-        </div>
+        {% if form.__name__ == 'embody' %}
+        <div class="col-4 mt-5 pt-5">
+            <div class="canvas-container">
+                <span class="canvas-info"></span>
+                <canvas id="embody-canvas" class="crosshair" width="20" height="20"></canvas>
+            </div>
 
-        {% for embody_question in embody_questions %}
-                <img id="idembody-{{embody_question.idembody}}" class="embody-image {% if loop.last %}last-embody{% endif %} {% if loop.index != 1 %}hidden{% else %}selected-embody{% endif %}" src={{ embody_question.picture }} />
-        {% endfor %}
+            {% for embody_question in embody_questions %}
+            <img id="idembody-{{embody_question.idembody}}"
+                class="embody-image {% if loop.last %}last-embody{% endif %} {% if loop.index != 1 %}hidden{% else %}selected-embody{% endif %}"
+                src={{ embody_question.picture }} />
+            {% endfor %}
 
-        {% for embody_question in embody_questions %}
-                <p id="idquestion-{{ embody_question.idembody }}" class="embody-question {% if loop.index != 1 %}hidden{% else %}selected-embody{% endif %}"> {{ embody_question.question }}</p>
-        {% endfor %}
+            {% for embody_question in embody_questions %}
+            <p id="idquestion-{{ embody_question.idembody }}"
+                class="embody-question {% if loop.index != 1 %}hidden{% else %}selected-embody{% endif %}">
+                {{ embody_question.question }}</p>
+            {% endfor %}
 
-        <img id="baseImageMask" class="hidden" src={{ url_for('static', filename='img/dummy_600_mask.png') }} />
+            <img id="baseImageMask" class="hidden" src={{ url_for('static', filename='img/dummy_600_mask.png') }} />
 
-      </div>
-    {% endif %}
+        </div>
+        {% endif %}
 
-  </div>
+    </div>
 </div>
 
 <br>
 <h4 class="text-center">{{ rating_instruction }}</h4>
 
- <!-- Select form type -->
+<!-- Select form type -->
 
- {% if form.__name__ == 'embody' %}
+{% if form.__name__ == 'embody' %}
 
 
 
-  <form id="canvas-form" class="form-group mt-5" action="/task/embody/{{ page_num }}" method="post" >
+<form id="canvas-form" class="form-group mt-5" action="/task/embody/{{ page_num }}" method="post">
 
     <input id="canvas-data" type="hidden" value="" name="coordinates">
 
@@ -139,29 +150,29 @@
             <p>{{ _("Reload the page if canvas didn't appear") }} </p>
             <p>{{ _('You can zoom in/out the page view by pressing ctrl+/ctrl- (Windows) or ⌘+/⌘- (Mac)') }} </p>
         </div>
-    </div>    
-  </form>  
+    </div>
+</form>
 
-<script src="{{ url_for('static', filename='js/canvas.js') }}" ></script>
+<script src="{{ url_for('static', filename='js/canvas.js') }}"></script>
 
 {% elif form.__name__ == 'slider' %}
 
-  <form class="form-group mt-5" action="/task/question/{{ page_num }}" method="post">
+<form class="form-group mt-5" action="/task/question/{{ page_num }}" method="post">
     {% for category in form.categories1 %}
-        {% for scale in form.categories1[category] %}
-            <div class="row form-group mt-0 mb-0">
-                <h6 class="col-3 text-right mt-0 mb-0">
-                    {{ scale[0] }} 
-                </h6>
-                <h6 class="col text-center mt-0 mb-0">
-                    <label for="customRange">{{ category[1] }}</label>
-                    <input type="range" class="custom-range" id="customRange" name={{ category[0] }}>
-                </h6>
-                <h6 class="col-3 text-left mt-0 mb-0">
-                {{ scale[1] }}
-                </h6>
-            </div>
-         {% endfor %}   
+    {% for scale in form.categories1[category] %}
+    <div class="row form-group mt-0 mb-0">
+        <h6 class="col-3 text-right mt-0 mb-0">
+            {{ scale[0] }}
+        </h6>
+        <h6 class="col text-center mt-0 mb-0">
+            <label for="customRange">{{ category[1] }}</label>
+            <input type="range" class="custom-range" id="customRange" name={{ category[0] }}>
+        </h6>
+        <h6 class="col-3 text-left mt-0 mb-0">
+            {{ scale[1] }}
+        </h6>
+    </div>
+    {% endfor %}
     {% endfor %}
     <div class="form-row text-center">
         <div class="col-12">
@@ -172,9 +183,9 @@
             <br>
             <p>{{ _('You can zoom in/out the page view by pressing ctrl+/ctrl- (Windows) or ⌘+/⌘- (Mac)') }} </p>
         </div>
-    </div>    
-  </form>  
+    </div>
+</form>
 
 {% endif %}
-    
+
 {% endblock %}
\ No newline at end of file