Not knowing what your printer is, I can't really help. They are all different to some degree.
If the preferences you are talking about is in the Windows printer driver, these settings don't get used by SambaPOS as SambaPOS talks to the printer in a different mode (ESC).
Do you have software to configure the firmware in the printer? maybe an option is in there.
A slight deviation, but I solved this issue in one kitchen as the beep was too quiet for the staff to hear, so I connect a 24v electronic buzzer to the cash drawer port and set the printer template to kick the cash drawer every time it prints. Problem solved.