- Thread Starter
- #81
Ted goes on to say:
I fully understand JA's measurements. This is my core area of expertise. Unfortunately it doesn't seem to be Ted's.
Most of JA's review is with regards to frequency response and such which I did not find fault with. I said the frequency response was flat and fine.
Past that, JA measures the response of the DS DAC trying to reproduce a -120 dB tone and fails to do so:
That is perfectly inline with my linearity measurements which show noise taking over at -120 dB:
All the way to the left -120 dB. We see that the response is off the chart showing nothing but noise.
Ted should note that my test uses very sharp filters so that it only allows the test tone at 1 kHz to get through. Despite that, the DAC could not produce a usable output even at that narrow response which got rid of 99% of the noise output of the DAC. JA does the same using long FFT measurement.
This is how an excellent but $99 DAC responds to the same test:
Let me repeat: this is a $99 DAC.
I fully understand JA's measurements. This is my core area of expertise. Unfortunately it doesn't seem to be Ted's.
Most of JA's review is with regards to frequency response and such which I did not find fault with. I said the frequency response was flat and fine.
Past that, JA measures the response of the DS DAC trying to reproduce a -120 dB tone and fails to do so:
That is perfectly inline with my linearity measurements which show noise taking over at -120 dB:
All the way to the left -120 dB. We see that the response is off the chart showing nothing but noise.
Ted should note that my test uses very sharp filters so that it only allows the test tone at 1 kHz to get through. Despite that, the DAC could not produce a usable output even at that narrow response which got rid of 99% of the noise output of the DAC. JA does the same using long FFT measurement.
This is how an excellent but $99 DAC responds to the same test:
Let me repeat: this is a $99 DAC.