I notice when I'm approaching and even into mania that I have little "glitches" too. Auditory abnormalities, though minor, are the usual ones of those. Usually it's no more than a drawn out phaser sound but it's been as far as voices and music. The voices are my inner voices, of which there are three, and they are distinct. I'm not split personality, I've been checked. It's me talking to me. I write most of the visuals off as acid flashbacks, which sometimes last a few minutes even, but sometimes it's one thing that morphs, but only slightly.
Does any of this seem similar?