Used a Surface Pro 1 + Focusrite Scarlett 2i2 (1st gen) for measurements. Note, this is an incredibly modest rig, so don't expect AP-level results. Source is Soundaware D100 Pro into AES on Menuet. Balanced output and input, with 10dB XLR attenuator at input of 2i2. Otherwise signal gets too and distorts the unit. Note that because I had to manually adjust the gain after, that could add noise or affect results, plus means channels won't be precisely matched. Similarly, -3dB on most tests for my strikes a good balance between being less likely to overload the DAC chip/module, less likely to overload the ADC, and still provides similar results to 0dB or -1dB signals. (If I'm too far out from baseline requirements, please move to unsanctioned sub-forum.) 1KHz Sine at -3dB, 16/48 1KHz Sine at -3dB, 16/48, spectrum extended out to 48KHz (ADC at 96KHz) 1KHz Sine at -60dB, 16/48 1KHz Sine at -90.31dB, 16/48 1KHz Sine at -90.31dB, 16/48 - Note the 3 discrete steps. A little noisy due to the extra gain on the ADC, but this is a good result taking that into consideration. 1KHz Sine at -90.31dB, 24/48 1KHz Sine at -90.31dB, 24/48 - Note that the 24-bit, low-level sine is relatively well represented. 1KHz Sine at -100dB, 24/96 - I didn't grab a shot of the waveform, but while it was fairly noisy, the 1KHz wave was clearly present.