To catch up, I've figured out how to:

-Trigger a record, loop, wait states using a button connected to a GPIO pin.

-Record the audio during the record phase.

But I cannot play the audio during the loop. I've got it working on my laptop, but on the PI, I get a SIGSEGV error from pyo's SfPlayer method. 

I tried a bunch of different workarounds, which have not worked. I tried playing the audio via a different program, such as aplay, which does work in isolation. But it fails when trying to play with the main program because the two processes: pyo and aplay both want to lock the audio to them. And only one can win, ala Highlander.

Sooo, I suspect it may work if I use Jack as the audio backend instead of the default portaudio. But to do that, I have to compile pyo from scratch with Jack support enabled. I've tried twice and am not having luck with python recognizing the rebuilt pyo. I am trying again. Fingers crossed.