In mania, I don't hear voices, but I do hear classical music that's never been composed (don't ask me how I know that, I just do). I also tend to hear static, like when you're between radio stations and can hear both of them at the same time. Then there was the time I was suicidally depressed and "saw" black and grey cats running under the linen cart in the ER. That was weird. What little was left of my logical mind tried to explain to me that that was impossible, there were no cats in the ER, but the rest of my brain wasn't buying it. Those cats were as real to me as the bare "suicide room" I was sitting in.

That little wingding got me diagnosed as bipolar 1, even though it happened during a depressive phase and not a manic one. Four years later, I haven't had any more psychotic occurrences since then, but then I am very well medicated and not much gets through the protective layer of drugs.