i have a project in mind, that i would like to know if its possible and the right way to do.
I play a lot Pen and Paper and would like to build my own soundboard where i can control the background music. Adaptive Soundtrack should be possible and i want to have some kind of buttons for presets.

So the micro controller should be able to play 4 or more tracks at the same time, and be able to control the volume of each of these tracks. So i could move from an "ambient" track to a "battle" track on the fly.
i only have some Arduino boards but i would like to try the teensy 4 with the Audio shield.
Do i need something else? Is that hard to program?

Thank you