I'm currently working on a project that needs to loop a few second audio clip every couple of minutes over a few hour period. I'd prefer to stay away from embedded computers, ie raspberry pi's and the like, since the project will be sent to production and needs a long battery-life. While researching solutions, I came across this on Adafruit:
https://www.adafruit.com/product/2220 This is essentially exactly what I need, the only issue is that I'm trying to integrate this into a production PCB, so the idea of spending $25 a piece for these, along with the fact I can't order the flash pre-programmed, is a bit of an issue. I know Adafruit offers the schematics to this board, so in theory I could just lift the design from there, but the main component isn't available on Digikey, and I'm not sure if they've flashed it with some custom, non-commercially licensed firmware. Does anyone have some ideas as to how I could proceed? Should I just use an imbedded Linux machine, something that consumes less power than an RPI, or is there an easier way?