diff --git a/src/BufferLoader.py b/src/BufferLoader.py
index 3f602b0..0a25f6f 100644
--- a/src/BufferLoader.py
+++ b/src/BufferLoader.py
@@ -71,6 +71,6 @@ def get_sample_rate(self):
 
     def quit(self):
         self.may_start = False
-        if hasattr(self, "device") and self.device.acquiring:
+        if self.device is not None and self.device.acquiring:
             self.device.stop()
             self.device.close_device()
diff --git a/src/main.py b/src/main.py
index 6e738ad..15a3af5 100644
--- a/src/main.py
+++ b/src/main.py
@@ -13,7 +13,6 @@ def main():
     # Use XCB platform for Qt
     # Wayland does not render drop shadows or toolbar colors and offsets popups
     os.environ["QT_QPA_PLATFORM"] = "xcb"
-    #qt.qpa.plugin: From 6.5.0, xcb-cursor0 or libxcb-cursor0 is needed to load the Qt xcb platform plugin.
 
     base_dir = get_base_directory()
     config_file_path = os.path.join(base_dir, "settings.json")