diff --git a/_server/editor_ui.js b/_server/editor_ui.js
index 4965f1ea..cc9588ed 100644
--- a/_server/editor_ui.js
+++ b/_server/editor_ui.js
@@ -792,8 +792,10 @@ editor_ui_wrapper = function (editor) {
                 }
                 // 试听音频
                 if (one.endsWith('.mp3') || one.endsWith('.wmv') || one.endsWith('.ogg') || one.endsWith('.wav')) {
-                    html += "<button onclick='editor.uievent._previewMaterialAudio(this)' style='margin-left: 10px'>试听</button>";
-                    html += '<br style="display:none"/><audio controls preload="none" src="'+directory+one+'" style="display:none; max-width: 100%"></audio>';
+                    html += "<button onclick='editor.uievent._previewMaterialAudio(this)' style='margin-left: 10px'>播放</button>";
+                    html += `<small style='display:none; margin-left: 15px'>0:00 / 0:00</small><br style="display:none"/>
+                        <audio preload="none" src="${directory+one}" ontimeupdate="editor.uievent._previewMaterialAudio_onTimeUpdate(this)"></audio>
+                        <progress value="0" max="1" style="display:none; width:100%" onclick="editor.uievent._previewMaterialAudio_seek(this, event)"></progress>`;
                 }
                 html += '<br/>';
             });
@@ -824,19 +826,41 @@ editor_ui_wrapper = function (editor) {
     }
 
     uievent._previewMaterialAudio = function (button) {
-        var br = button.nextElementSibling;
+        var span = button.nextElementSibling;
+        var br = span.nextElementSibling;
         var audio = br.nextElementSibling;
+        var progress = audio.nextElementSibling;
         if (br.style.display == 'none') {
-            button.innerText = '折叠';
+            button.innerText = '暂停';
             br.style.display = 'block';
-            audio.style.display = 'block';
+            progress.style.display = 'block';
+            span.style.display = 'inline';
+            audio.play();
         } else {
-            button.innerText = '试听';
+            button.innerText = '播放';
             br.style.display = 'none';
-            audio.style.display = 'none';
+            progress.style.display='none';
+            span.style.display = 'none';
+            audio.pause();
         }
     }
 
+    uievent._previewMaterialAudio_onTimeUpdate = function (audio) {
+        var _format = function (time) { return parseInt(time/60) + ":" + core.setTwoDigits(parseInt(time) % 60); }
+        if (audio.duration > 0) {
+            audio.previousElementSibling.previousElementSibling.innerText = _format(audio.currentTime) + " / " + _format(audio.duration);
+            audio.nextElementSibling.setAttribute('value', audio.currentTime / audio.duration);
+        }
+    }
+
+    uievent._previewMaterialAudio_seek = function (element, event) {
+        var audio = element.previousElementSibling;
+        var value = event.offsetX * element.max / element.offsetWidth;
+        element.setAttribute("value", value);
+        audio.currentTime = audio.duration * value;
+        if (audio.paused) audio.play();
+    }
+
     editor.constructor.prototype.uievent=uievent;
 
 }
\ No newline at end of file
diff --git a/project/data.js b/project/data.js
index 396be475..4f33fa23 100644
--- a/project/data.js
+++ b/project/data.js
@@ -36,9 +36,7 @@ var data_a1e2fb4a_e986_4524_b0da_9b7ba7c0874d =
 			"bomb.mp3",
 			"centerFly.mp3"
 		],
-		"fonts": [
-			"number"
-		],
+		"fonts": [],
 		"nameMap": {
 			"背景图.jpg": "bg.jpg",
 			"背景音乐.mp3": "bgm.mp3"
diff --git a/project/fonts/number.ttf b/project/fonts/number.ttf
deleted file mode 100644
index bcf90fae..00000000
Binary files a/project/fonts/number.ttf and /dev/null differ
diff --git a/server.py b/server.py
index c6d279ff..6aaea881 100644
--- a/server.py
+++ b/server.py
@@ -67,7 +67,10 @@ def static_file(path):
 	if not os.path.isfile(path):
 		abort(404)
 		return None
-	return Response(get_file(path), mimetype = get_mimetype(path))
+	mimetype = get_mimetype(path)
+	response = Response(get_file(path), mimetype = mimetype)
+	if mimetype.startswith('audio/'): response.headers["Accept-Ranges"] = "bytes"
+	return response
 
 def process_request():
 	data = request.get_data() # str in py2 and bytes in py3
diff --git a/styles.css b/styles.css
index a188118e..d981dfdf 100644
--- a/styles.css
+++ b/styles.css
@@ -218,7 +218,7 @@
     max-height: 1.6em;
 }
 #statusBar span{
-    font: bold italic 1.1em number, Verdana;
+    font: bold italic 1.1em Verdana;
     display: inline;
 }
 #statusBar p {