Came across this recently on line and thought it was of interest.
Someone posted "She's Got Rhythm" on youtube:
http://www.youtube.com/watch?v=aXsx2w8Em_8In the comments of the video is one by "Ron Altbach" which reads as follows: "Here's the story. I was sitting at the piano in our studio at MIU, playing what became the verses of this, and Brian walked in and just started singing his falsetto. He liked the energy of what I was playing and it became my first co-written song with Brian and Mike."
I wasn't sure the comment was legit, so I clicked on the name and found Ron Altbach's channel:
http://www.youtube.com/user/raltbach It turns out the guy is a very talented classical pianist. He has a number of videos of himself performing Chopin, Debussy, and most recently Beethoven's Waldstein sonata. I listened to the Waldstein, which is a beautiful piece. Altbach's performance isn't quite at the level of Horowitz or Schiff, but it's still very impressive.
There is another video on youtube
http://www.youtube.com/watch?v=-SVB-EvYtNw from what appears to be the late 70s in which Altbach talks about his classical music background, training with Nadia Boulanger, his rock and roll work with King Harvest, his meeting of Mike Love, and then his creation of "Lady Lynda" (which seems to have been as much Altbach's work as Al Jardine's).
I've always been a big fan of the MIU album, and learning what an extraordinarily talented guy Ron Altbach is really helped me understand why the album turned out so great. Makes me wish the band had included him (along with Ricky and Blondie, of course) in the 50th reunion.