The quantization of amplitude isn't quite that straight forward though. Usually some form of dithering is involved to transform any quantization errors into a

The quantization of amplitude isn't quite that straight forward though. Usually some form of dithering is involved to transform any quantization errors into a smooth noise. See http://www.audiocheck.net/audiotests_dithering.php http://www.audiocheck.net/audiotests_dithering.php And I'm pretty sure a DAC isn't supposed to output jagged waveform, no matter how high the resolution.