I am a professional musician. I have been playing professionally for over 20 years. I recently saw an episode of The Ben Heck Show where Felix was attempting to "hack" an acoustic guitar to make it electric with onboard recording capability. I like this idea, but would like to take it a few steps further. Here's the idea, which is based on a few gripes about musical instruments that all musicians have.
#1. 9 Volt Batteries suck. They are expensive, and some guitars (like my Taylor) will take one brand (Duracell) but others won't fit (Energizer and pretty much everything else). Make it rechargeable, either running off of internally mounted LiPo's, or something easily replaceable like 18650's.
#2. Incorporate Bluetooth, either to make the unit in and of itself wireless, or for amplifier modelling/effects usage through an app on a cellphone (or both). This could possibly be done by internally mounting a Raspberry Pi, or using two of them, interfacing each other, using one as a standalone touchscreen output module, and the other as a Bluetooth broadcaster.
#3. Make the output module universal, with outputs for 1/4", XLR, and 3/8" jacks. This will make the unit compatible with all standard PA equipment, and with home computers for recording purposes.
I really think this could not only be a cool project, but could be a marketable idea with potential on the 3rd party music market. Let me know what you guys think.

