The LPT connection is required for the actiPOWER EEG headset we use. We have an LPT port that runs from the computer to the headset and the headset to another computer that processes data (my PI wants it on two separate computers so we have to use the LPT port for the software to receive it correctly. That’s some interesting advice, we’ll check into the adapter (we’ll probably need one anyway if we ever upgrade the PCs).