We were doing this with an ISD5008. When that was discontinued we started moving into an ISD4003-08MPY. That was recently discontinued and are moving into an ISD17240. With a 4KHZ sampling frequency...
Depending on the samples and quality, you may find that you need quite a bit of storage (SD card with SDIO interface). The power of the PIC to handle raw samples may be severely short to get a...
esp8266 , audio in littlefs partition in flash would nail it, files can be modified with simple https browser i/f
on the devices own self generated access point
I know that Microchip has an encrypted, or so, unique serial number in some PICs but could not find that info in the parametric search. I can't recall how it is called.
I don't think you can encrypt an SD card. A password filter may be all you need. The bigger you make it, the better. I know Microchip offers specialty security chips that could be added to your...
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Re: Audio player
We were doing this with an ISD5008. When that was discontinued we started moving into an ISD4003-08MPY. That was recently discontinued and are moving into an ISD17240. With a 4KHZ sampling frequency...
peterdeco1 Today, 19:26