UPDATE

app.py

@@ -139,6 +139,13 @@ with gr.Blocks(title="Audio Fusion") as iface:
 client = TelegramClient('session_name', API_ID, API_HASH)
 
 # Define the states for user interaction
+class State:
+    def __init__(self, client) -> None:
+        self.slow = 
+        self.speed = 
+        self.reverb = 
+        self.reverse = 
+
 states = {}
 
 @client.on(events.NewMessage(pattern='/start'))
@@ -198,9 +205,11 @@ async def audio_effect_handler(event):
     else:
         return await event.answer("INvalid for now...")
         
-
+    audio_file = BytesIO()
+    audio = modified_sound.export(audio_file, format="mp3")
+    audio.seek(0)
     # Update the user's state with the modified sound
-    states[user_id]['audio'] = modified_sound.raw_data
+    states[user_id]['audio'] = audio
 
     await event.answer("Effect applied. Click /send to receive the modified audio file.", alert="True")