Thanks Amir for this review.
For this kind of device, ADC is more important than DAC.
Also, mic input is probably (noticiably) better than line input, even at line level.
They state an EIN A of 127dBu A at 150 ohm in the manual, which is not too bad.
You should see a better SNR.
I try to standardize somehow interface mic input testing to a similar gain / level.
I set the gain to have max 100mV before saturation or at 0dBFS, note and publish the gain marking, then measure SNR at -10dBFS and SINAD at -0 5dBFS.
This gain level, at least, gives a realistic use case for a dynamic microphone use.
Noting the gain marking allows proper comparison of interfaces with various (and often not published) ADC Max Voltage.
Also, checking SNR (A) with a 150 ohm load for a few gains around this refetence gain helps getting an idea how the dynamic range evolved with gain.
If you have a chance...
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