Working on bug in leaving

sound.py

@@ -21,17 +21,23 @@ class PCMStream:
 
         self.stream = sd.RawInputStream(device=_device_id)
 
+    # Stops and destroys the current stream
     def clean_up(self):
         if not self.stream.closed:
             self.stream.stop(ignore_errors=True)
             self.stream.close(ignore_errors=True)
 
+    # Stops the current running stream but does not destroy it
     def pause(self):
-        self.stream.stop(ignore_errors=True)
+        if self.stream.active:
+            self.stream.stop(ignore_errors=True)
 
+    # Plays the stream
     def play(self):
-        self.stream.start()
+        if not self.stream.active:
+            self.stream.start()
 
+    # call back read function for the stream
     def read(self, num_bytes):
         if self.stream.active:
             # frame is 4 bytes