the fiiference between pictores and pistores cannot be heard
I also had trouble understanding the audio, but mine was a completely different problem: I just couldn't make out what the very first letter of the sentence was. I've reported it as "The audio does not sound correct".
I thought the guy was saying Histores, so i typed that and it says i was correct, even though my answer was obviously wrong.
I did hear the same: "Histores" instead of "Pistores", typed "Histores" and was surprised buy the answer being correct and translated as "Bakers".
I was under the impression that "Pistor" was a Miller or a baker?