Make tuning variables reboot-proof

[Retroman445]

Hi,

Was wondering whether it would be at all possible to make the tuning "stick" during power-cycles. This way I can tune the respeaker on my laptop and connect it to another device which is not able to run the tuning.py script.

Can be done in two ways possibly I think.

1. Save the tuning on the respeaker itself.
2. Save the tuning to a custom firmwarefile and flash the device with it.

Currently I lose the tuning when power-cycling.