Add labs flag for voice messages

src/i18n/strings/en_EN.json

@@ -783,6 +783,7 @@
     "%(senderName)s: %(stickerName)s": "%(senderName)s: %(stickerName)s",
     "Change notification settings": "Change notification settings",
     "Spaces prototype. Incompatible with Communities, Communities v2 and Custom Tags. Requires compatible homeserver for some features.": "Spaces prototype. Incompatible with Communities, Communities v2 and Custom Tags. Requires compatible homeserver for some features.",
+    "Send and receive voice messages": "Send and receive voice messages",
     "Render LaTeX maths in messages": "Render LaTeX maths in messages",
     "Communities v2 prototypes. Requires compatible homeserver. Highly experimental - use with caution.": "Communities v2 prototypes. Requires compatible homeserver. Highly experimental - use with caution.",
     "New spinner design": "New spinner design",

src/settings/Settings.ts

@@ -128,6 +128,12 @@ export const SETTINGS: {[setting: string]: ISetting} = {
         default: false,
         controller: new ReloadOnChangeController(),
     },
+    "feature_voice_messages": {
+        isFeature: true,
+        displayName: _td("Send and receive voice messages"),
+        supportedLevels: LEVELS_FEATURE,
+        default: false,
+    },
     "feature_latex_maths": {
         isFeature: true,
         displayName: _td("Render LaTeX maths in messages"),