DIY open-source whole-home audio My home was built in the mid 90s, and was fairly technologically advanced, for the time. It had a burglar alarm, intercom system, central vac, and more. I’ve already blogged about the burglar alarm , and tying it into HomeAssistant. This post mostly concerns the intercom system, or rather, the remnants of it. Remnants of the Intercom System Like many homes built…