creadas dos versiones. la primera exporta solo a wav, la segunda, exporta igual al formato de entrada

manifest.json

@@ -0,0 +1,22 @@
+{
+  "name": "Audio Cutter",
+  "short_name": "Cutter",
+  "start_url": "index.html",
+  "display": "standalone",
+  "background_color": "#121212",
+  "theme_color": "#2196F3",
+  "icons": [{ "src": "icon.png", "sizes": "512x512", "type": "image/png" }],
+  "share_target": {
+    "action": "/index.html",
+    "method": "POST",
+    "enctype": "multipart/form-data",
+    "params": {
+      "files": [
+        {
+          "name": "audio_file",
+          "accept": ["audio/*"]
+        }
+      ]
+    }
+  }
+}