How did Carl learn to be such a good producer/arranger?
My understanding of The Beach Boys' production history (although I could be wrong about this) is that all the albums up to and including Friends were largely produced by Brian, although some of them were credited to the band as a whole. Tragically, following a lot of issues in his personal life, Brian was no longer able to be involved to the same extent he had been up to that point following Friends, and Carl really stepped up and became the band's producer for the next few albums.
My question is how did Carl learn how to be a producer so quickly, and also do such a good job? Did Brian teach him? Did he just sit and observe Brian when he was younger? Did Stephen Desper (their main engineer during those years) teach Carl the basics? Was it just something kind of innate gift that Carl had much like Brian did? I don't really know much about how music production worked in those days (or really in any period of history), but I have to imagine it was something that took a lot of patience and expertise, especially in those days where everything was on tape.