I had a period of musical hallucinations that was exactly as you describe, though I don't think I was manic at the time, or at least not most of the time. It became very disturbing for me as the musical hallucinations started to ocurr more and more throughout the days. The whole experience lasted months. What was original music of various types became that DJ static you mentioned, then the worst happened. I started hearing an intro to a song I did know, but it repeated and repeated again and again for weeks. My psychiatrist sent me to a neurologist and I had several EEGs. Both had considered Tegretol XR (both a bipolar moodstabilizer and antiepileptic). It took a while, but when I reached 1400 mg (a large dose) the music stopped. It was a relief, but the experience has affected my enjoyed of music. The enjoyment has started to increase over the years, but has never fully returned. I almost never dance. When I try, it fizzles out. I only watch TV and movies with my husband, despite being at home all day, and generally only talk programs. Music and dance had been my passions.

I wrote a whole blog post about this topic once. To this day, I'm unsure if the musical hallucinations were psychiatric-based or seizure-related. Oddly, my psychiatrist was sure they were seizure-related. The neurologist thought they were psychiatric based. She did eventually diagnose me with possible Simple Partial Seizures, but from other symptoms and one of my four EEGs, the sleep deprivation EEG.

I eventually went to an epileptologist for a second opinion. He said my sleep deprivation EEG results didn't definitively show seizure activity. He wanted me to have a 3 to 6 day in-hospital EEG, but my husband discouraged it. The epileptologist wanted to halve my Tegretol XR, and that scared the hell out of my husband and me.

I haven't had musical hallucinations for about 7 years, since reaching that Tegretol XR dose. I haven't had anything else that would possibly be seizure activity. I have been manic several times since, but didn't have anything musical going on.

I have read other people with bipolar disorder mention musical hallucinations. Apparently a small number of people with seizures occasionally do, too.

Note: I did eventually realize that the music I heard during my musical hallucinations was not real, even while having them. In contrast, I truly thought my bipolar psychosis delusions and hallucinations were real, while having them.