Hi, Bob,
You linked me to this a week or so ago, at which time I was not aware that you were using the ADAU1701. Could you answer a couple of questions? 1) How fast are you running the 1701?; 2) Do you have any idea how close you are to running out of resources on the part?
I am working on a very similar application, albeit not for FM Stereo. I figure on running the 1701 at 192kHz, and am terrified that I'll run out of steam. My circuit is a bit less complex (fewer parts) than yours, but I figure at 192kHz I'll be gobbling up resources at 4X.
The 1701 compiler output does not give a nice accounting of which menu parts use how much overhead; I have another posting about that situation. Many thanks; nice design, that PLL is genius.