WinAAM is a tool that you can use to make a hard disk drive quieter by modifying how quickly it operates in some ways.
I have optimised the noise performances of my home studio computer with fanless graphic card, variable speed tower fan, large CPU radiator, free air flow in the box, "noiseless" power supply and low frequency side panels damping/absorbing material.
Now I can clearly hear the noise of my hard disks !
I have to try this automatic acoustic noise manager...
If you want to add a LED status indicator for your true bypass pedals and only have DPDT footswitches, this small circuit can help. You only need a Mosfet transistor, a NPN transistor as a low leakage diode, a diode, a resistor and of course a LED.