In audio_hw_probe in sys/dev/audio/audio.c, the default preferred format will be scored based on the number of hardware channels.
This makes sense for hardware that supports monaural and stereo formats, so stereo will be preferred. However, for hardware that supports surround, it can result in the default format being a surround format, which can be confusing or not result in proper audio output, e.g. https://www.unitedbsd.com/d/458-audio-on-macbookpro-2015-for-netbsd Should this be adjusted to not prefer channels >= 3?
