I suspect that if I could replace my ATMEGA168 with an ATMEGA 368 (as suggested by Robert, thanks!) life might be better for my Arduino and its attempt to use the waveshield. The problem is ATMEGA328s seem to be scarcer than hen’s teeth, especially in the PDIP package. I found a place in Canada that had some, but the shipping is prohibitive. Adafruit, Digikey, Arrow, NuElectronics, Sparkfun, all out of stock. Groan.