This release includes
* input selection
* Input gain adjustment
* Per-output channel attenuation adjustment for volume control and panning
To use in CircuitPython, simply install the [Adafruit CircuitPython bundle](https://github.com/adafruit/Adafruit_CircuitPython_Bundle).
To use in CPython, `pip3 install adafruit-circuitpython-bd3491fs`.
Read the [docs](https://circuitpython.readthedocs.io/projects/adafruit-circuitpython-bd3491fs/en/latest/ for info on how to use it.