Need to get 4 independently controllable frequency outputs, PBP can do that?

[mpgmike]

4 separate PIC's with NCO modules. Done..... Why add unnecessary hardware?

I have a project I was using 3 PICs for 3 NCOs. I updated it adding a touch screen to replace buttons & LEDs, and while at it, replaced 3 PICs with a single PIC18F27Q43 (have to use MPLABX & XC8 since PBP doesn't yet cover that part). That still leaves one more NCO for you.