Except the fact that XR2206 and all similar analog sig-gen-on-a-chip devices are obsolete and essentially unobtainable as raw parts. Ok, you can buy cheap chine

Except the fact that XR2206 and all similar analog sig-gen-on-a-chip devices are obsolete and essentially unobtainable as raw parts. Ok, you can buy cheap chinese "arduino-like" module that purportedly is built around such chip....