Do someone know about what voices use to have the languages with triliterate alignment? I think they use to have active, passive ant antipassive, but how they form and what cases do they use for them?
I'm especialy interested in the antipassive one, and if someone have middle voice.
I want to know it because I'm working on voices in my conlang (I've already finished the middle one, but I have doubts about the pasive and the antipassive).

Thank you in advance

Honestly not sure what you mean by 'triliterate alignment' here. If you mean a language with three distinct voices (usually active, middle, and passive) then both Swedish and Icelandic are good examples. Old Norse and Ancient Greek are also good examples, but information on those two languages is harder to come across. The antipassive voice is present in most Australian Aboriginal or Native American languages. It's also present in Basque, though it works differently.