I think the best way to answer this is to understand what is going wrong. What's causing the device to go wrong is that some sort of glitch--like a software bug, a hardware bug, an environmental glitch (power spike or drop), etc. has caused the system to be in a state that doesn't work. For example a software bug has overwritten the variable that tracks the number of players. or a hardware glitch where if the power drops for a millisecond or two, the DAC loses some sort of initial configuration.
So how do you fix that? Just turn the power off, then back on and the device will start back up in the initial, pristine configuration.