Conversation so far:
What started Steve Vai's music career in 1979?
Vai sent both a notated transcription of Frank Zappa's The Black Page, and a recording of his college band, Morning Thunder, to Zappa.
What was Frank Zappa's response to Steve Vai sending him a notated transcription?
Zappa responded by putting Vai on salary as a transcriptionist to transcribe his work.
How did Steve Vai's work progress from there?
After leaving Berklee College of Music and moving to California, Vai auditioned for and became a full-time member of Zappa's band, going on his first tour with Zappa.
What instrument did Vai play in Frank Zappa's band?
Guitar.
What did Steve Vai do after playing for Frank Zappa?
Vai bought a house in Sylmar, Los Angeles, where he built his first professional studio.

Question: Where was his studio located?
Self-contained rewrite: Where was Steve Vai's studio located?