Yeah...I'm afraid it sounds like he 'recorded whatever came out' on 'Electronic Sounds'- a bizarre album that certainly doesn't equal to what I expect in music. I had this extremely rare album about 2 years ago but sold it fairly swiftly. As I recall reading, there was some controversy that Bernie Krause, the resident Moog guru of the era that recorded some albums as 'Beaver and Krause' and taught Stevie Wonder how to play the Moog, had played everything on the album and didn't receive due credit. I wouldn't have owned up to it, myself!
There is, however, some decent Moog playing on 'Abbey Road' that shows he'd managed to master it fairly well.