it is positively the most sonicly complex album of its day. lots of extreme production work... for one song, the stripped the case off a piano had one person press the keys as if playing, but lightly - so as to only raise the dampers not strike the hammers... and then one person had climbed inside and plucked the strings as they were "played"
The echo chamber that the vocals for Good Vibrations was recorded in was actually someone's Nearly empty swimming pool that had been covered for the winter