I watched a video of that on the history channel. There was a version where they hooked up a instrument into it that converted the screams of its victims into a bull's groan. Greece was one fucked up place for sure
thats the only version there is lol... look at this from the wiki
Phalaris commanded that the bull be designed in such a way that its smoke rose in spicy clouds of incense.
[2] The head of the ox was designed with a complex system of tubes and stops so that the prisoner's screams were converted into sounds like the bellowing of an infuriated bull.
[3] It is also said that when the bull was reopened, the scorched bones of the remains shone like jewels and were made into
bracelets.
[2]
Perillos said to Phalaris: “[his screams] will come to you through the pipes as the tenderest, most pathetic, most melodious of bellowings”.
[4]