The last module on the The Human Comparator 73-75 Homebuilt #1, looks to be an audio output. I cant find an equivalent module from Prism at this time. So have just used another brands out module. I don't suggest using that however. I think the best approach is to talk to Prism about creating an out, using a modified version of adapter, to convert to 1/4 jack out. i suspect that the THC out is a mult to mono out with an attenuator on it. We could ask someone to find out.