Now you know the source of your singing voice

The more active that area of the cortex was, the higher the speaker's pitch on individual words would be.

Did you know which part of your brain helped you sing or change your voice pitch? Scientists have now identified the part of the brain which governs the "music" of speech and is responsible for controlling the voice pitch.
The findings suggested that activation of neurons in one brain area, called the dorsal laryngeal motor cortex, was linked with quick changes in pitch, such as when different words are emphasized in a sentence.
The more active that area of the cortex was, the higher the speaker's pitch on individual words would be, both during speech and when the subjects were singing a simple melody.
"Understanding how we speak goes far beyond just knowing where speech functions are localized in the brain. Even more important is to understand how brain cells actually encode the command signals for the muscles of the mouth and throat that make speech possible," said Edward F. Chang from the University of California.