Amend ALSA options
It took me quite some time to figure out how to configure my alsa configuration. I would recommend adding a mapping from aplay -L because it's everything but trivial to map especially the default.
It says:
The alsa driver normally chooses one of "surround71", "surround51", "surround40", "front", or "default" automatically depending on number of output channels.
I would change to:
You can see the available devices by running aplay -L. Use the name before the colon, for example "surround71", "surround51", "surround40", "front", or "default". The alsa driver normally chooses one of these in the order above automatically depending on the number of output channels.