The noise level is half the LSB value (0.5). So SQNR = 20Log(32767/0.5) = 96.33 db. The CD cannot contain a value smaller than 1 nor larger than 32767. So DR = 20Log(32767/1) = 90.31 db.Hanuman wrote: ↑09 Nov 2019 03:11In a PCM system, as we know, there exists an easily seen absolute maximum recorded level that can't be exceeded no matter what. That level becomes the reference level against which the S/N ratio is calculated. It follows that the resulting number is also the dynamic range.

However please note that the practical useful dynamic range has a frequency dependency also. The practical useful dynamic range decreases as frequency decreases due to the relationship between frequency and sampling rate.