… continuing:

It turned out that Sylvia found that music by Bach sometimes eased her hallucinations. When Dr. Kumar and his colleagues measured the effect in their lab, they found a consistent pattern: once the Bach stopped, Sylvia had several seconds of total relief from the hallucinations. Then the hallucinatory piano gradually returned, reaching full strength about a minute and a half after the Bach ended.

[…]

If the theory holds up in further research, it could explain why real music provides temporary relief for musical hallucinations: the incoming sounds reveal the brain’s prediction errors. And it may also explain why people are prone to hallucinate music, and not other familiar sounds.

[…]

Rx for the hallucinating wingnuts: Bach.