attempt to update audio stream settings on hardware changes

[fogg4444studio]

Right now when the app starts the init function handles the setup for PortAudio, this assigns connections to the I/O device based on the available defaults from the OS settings. We want to listen for changes to this environment and update the PA stream accordingly so the application doesn't crash if the system IO device settings are changed from beneath.

Nice to have: settings configuration

Alternatively, do nothing (just don't crash the application) or have a warning about misconfiguration for now.