http://www.analog.com/en/analog-dialogue/raqs/raq-issue-90.html According to the article above, ENOB is calculated using this formula: ENOB = (SNR – 1.76)/6.02 dB It also says that to claim certain number of bits of resolution, the converter’s differential linearity must be <1 LSB at the specified resolution. The formula for this I found here: https://masteringelectronicsdesign.com/an-adc-and-dac-least-significant-bit-lsb/ Based on what we have seen with Amir's plots, is his threshold for bits of resolution <1 LSB? Or is it more or less restrictive? I ask because I don't know enough to know how to calculate the answers myself. @purr1n It seems clear that Schiit Audio is claiming 21 bits of resolution. Based on the above, is that what your measurements show? ENOB based on Schiit Audio's published SNR of 119dB is 19.5.