leave iodevice alone after calling .stop()

Docs say it should not be accessed, and it fails on Linux.

qt/aqt/sound.py

@@ -604,16 +604,14 @@ class QtAudioInputRecorder(Recorder):
         self._buffer += self._iodevice.readAll()
 
     def stop(self, on_done: Callable[[str], None]):
+        # read anything remaining in buffer & stop
+        self._on_read_ready()
         self._audio_input.stop()
 
         if err := self._audio_input.error():
             showWarning(f"recording failed: {err}")
             return
 
-        # read anything remaining in buffer & close
-        self._on_read_ready()
-        self._iodevice.close()
-
         # swallow the first 300ms to allow audio device to quiesce
         wait = int(44100 * self.STARTUP_DELAY)
         if len(self._buffer) <= wait: