Please answer the following question: - death place is vancouver , washington    - birth name is walter david hassinger    - death date is 15 august 2007    - genre is pop , rock      - birth date is 31 march 1927      - background is non_performing_personnel    - birth place is los angeles , california    - associated acts is the prunes , jefferson airplane , the grateful dead , the rolling mamas and the papas stones , elvis presley , the electric    - occupation is record producer , sound engineer    Given the details above, guess who could this information be about.
A:
david hassinger