This is interesting news to me - are you saying that Cirrus has had a 3-chip method of simulating the 49700, such that folks could work on platform development with that as an intermediate step? I can't imagine being able to yank a trio of TI or Analog Devices chips and replace them with a single Cirrus chip without incurring significant revisions to the code, but if it was a Cirrus product that was designed to behave like a 49700 that would be a different story entirely.