Sound works with no fettling. Plugging my wired headphones in works as expected, and it was also a snap to pair a set of Bluetooth headphones and those work too.
Youtube video performance is not great (either whatever tiny Intel GPU this has is worse than I thought, or there'll be a properietary driver I need to find and manually enable), but getting sound hooked up was totally fine - a relief, since Linux generally has (had?) a pretty bad reputation for this.