[mirotalksfu] - reduce Sounds volume

public/js/Room.js

@@ -1264,6 +1264,7 @@ async function sound(name) {
     let sound = '../sounds/' + name + '.wav';
     let audio = new Audio(sound);
     try {
+        audio.volume = 0.5;
         await audio.play();
     } catch (err) {
         return false;

public/js/RoomClient.js

@@ -1716,6 +1716,7 @@ class RoomClient {
         let sound = '../sounds/' + name + '.wav';
         let audio = new Audio(sound);
         try {
+            audio.volume = 0.5;
             await audio.play();
         } catch (err) {
             return false;