Capitalist rent-seeking lockin bypassed with an inexpensive high-pressure tube fitting! The larger tank is 20% of the cost to refill and doesn't have to be swapped as often.
`demucs` is an amazingly decent tool that "*inputs `mp3` file, outputs separated `wav` files*" https://pypi.org/project/demucs/
New images are sent to the tags using the A7106 radio module from another tag, driven by gpio from a Pi. https://github.com/cibomahto/pya7106