How to do loopback test of DAC/ADC on macOS?

[Music1969]

I don't think it's appropriate to dither J-test test signal It's supposed to be a perfect square wave. Can't test the UAD interface for now, but I thought turning dither on or off might help decide if it's a quantization problem. But it might be some internal clock or other signal causing it.

The XLR input of my interface has SINAD rated at 104dB which I got close to.

The 1/4" TRS input has SINAD rated at 110dB but I didn't have any cable to test .

Now I do have TRS to XLR-F cable i'll retest.

Will be interesting to see if any change in the levels of this 2.75/3kHz multiples

I'm hoping all numbers drop by 6dB but i know things don't work like this LOL

 

[SharpEars]

The XLR input of my interface has SINAD rated at 104dB which I got close to.

The 1/4" TRS input has SINAD rated at 110dB but I didn't have any cable to test .

Now I do have TRS to XLR-F cable i'll retest.

Will be interesting to see if any change in the levels of this 2.75/3kHz multiples

I'm hoping all numbers drop by 6dB but i know things don't work like this LOL

So what was the result of the TRS port test, don't keep us in suspense !

 

[Music1969]

So what was the result of the TRS port test, don't keep us in suspense !

SINAD reduced a few dB but the J test spikes at multiples of 2.75/3kHz remained

Reported to manufacturer and waiting for their answer

In the meantime I want to get another interface and measure this interface's D to A and A to D separately, to see if the issue with these jitter spikes is only loopback related.

 

[moshc]

SINAD reduced a few dB but the J test spikes at multiples of 2.75/3kHz remained

Reported to manufacturer and waiting for their answer

In the meantime I want to get another interface and measure this interface's D to A and A to D separately, to see if the issue with these jitter spikes is only loopback related.

Just curious if you had any follow up to this?

 

[Music1969]

Just curious if you had any follow up to this?

Didn't hear back from manufacturer.

So didn't keep it around long enough to measure with another A to D.