Grave edge sounds and player hit sounds do not play if you are not vulnerable to them.

src/level.py

@@ -238,7 +238,7 @@ class Level:
             # Handle grave edge warnings
             if obj.isHazard:
                 distance = abs(self.player.xPos - obj.xPos)
-                if distance <= 2 and not self.player.isJumping:
+                if distance <= 2 and not self.player.isJumping and not self.player.isInvincible:
                     if self.edge_warning_channel is None or not self.edge_warning_channel.get_busy():
                         self.edge_warning_channel = play_sound(self.sounds['edge'])
             else: