Spamming ctrl and running Multiplicity on my primary computer, creates a sound.

Running Multiplicity on my computer as the primary computer, and when I press the ctrl key rapidly a sound is produced and use of the ctrl key is temporarily unavailable for about half a second. I double checked and my sticky keys are disable when these events occur. I also noticed that when I switched my primary computer to a secondary computer the ctrl spamming would not trigger the sound anymore. Is there any other way to disable that sound or feature while using my computer as a primary, or will I have to switch my computer to secondary every time I am not using multiplicity. Thanks in advance for any advice.