All right, well, thanks for your prompt response. Nothing urgent—I can use another device for this, or use the end-of-file state to trigger the next-event. But the design is very clean. As I remember, a radio station used this to play back a file...
I have an Audio Delivery Unit made by PJRC that plays an MP3 file upon manual start or contact closure, but I can't find any documentation on it. I would like, upon its start, to play the list of files sequentially upon start, but it seems to...