Amir tested like 150, 200 DACs or devices here, and still doesn't know how to properly set up a bandwidth to do a proper frequency measurement.
None of those DACs were broken as much as this one as to require bending over backward to extract even simple frequency response info out of it.
That's amateur level mistake.
Well, the amature mistake is a) to bring up this topic and b) buying a DAC with this (updated) frequency Response measurement:
So using totaldac d1-six as promoted in non-filtered mode, gets you the red curve which has a roll off starting as early as 3 kHz. By the time we get to 20 kHz, it is down 3.2 dB. No one mixes music assuming you play it back rolled off this way.
And let's agree that if your hearing extends to 20 kHz, you don't need any special training to hear this roll off.
It will be plain and obvious deviation from correct frequency response.
In my original test, this attenuation was more mild so that would have been in favor of the DAC. This new measurement damns it a lot more! See what I mean about it being a mistake to bring it up?
Note that even the correction filter doesn't get you flat response that a cheap DAC would. Worse yet, it gets rid of what folks cherish in these DACs: square wave response:
So now you have least of both worlds. Bad squarewave and bad response!
Back to statement about me, I was happy to run new tests. Your favorite designer has refused to run any whatsoever. I am transparent about what I do. I ran test after test, meeting every requirement for new measurements. I spent nearly a week on this device. I am not afraid of what the results show. The designer though seems terrified to post any measurements despite saying he has an Audio Precision analyzer. Can you tell me why someone with that analyzer would not post one thing with it?
