One of my modern desktops has an original SB-16 back from the late 1980s (or was it early 90s?). IIRC, the late Arny Kreuger measured that and other sound boards back in the day. They weren't great by modern DAC standards, but they were not bad, much better than their reputation, especially among audiophiles.
My favorite Nintendo music is from the Zelda series, especially Twilight Princess which is the only Zelda game I played all the way through on the Wii, took me about 80 hours.