Hey Zap.... my 12 month old DS is not much of a babbler.
Try and remember that all babies develop differently. Max may be sitting back watching, and come out with much more "intelligent" speech later, rather than begin babbling.
It might be worth a trip to your CHN, sometimes a lack of babble, or ill-sounding babble can mean a tongue tie, but they will also be able to assure you about his development.
Good luck!!