Review and Measurements of SMSL VMV D1 DAC

[helloworld]

Hello,Whether the sound(sound color) is standard when you measure PHD.

View attachment 15340
This is the real data of SMSL VMV D1 measured by our engineers.Could you like to check it again?
View attachment 15341
Could you like to leave a E-mail for us? Or you can cantact me: [email protected]
Something about the tips to connection of the unbalanced output.Because the output of the VMV D1 is a balanced signal.

I am glad you answerd here. But I guess it's better to invite your engineer to register an account and discuss this product here instead of using the email. Don't bother with the English, I think everyone here can understand.

 

[amirm]

Is there a way to turn off the ASRC in the ESS chip, a.k.a. run it in "sync" mode?

There is a setting for that. What do you want me to test with that?

 

[amirm]

Hello,Whether the sound(sound color) is standard when you measure PHD.

Yes I measured using standard.

 

[SMSL-Mandy]

I am glad you answerd here. But I guess it's better to invite your engineer to register an account and discuss this product here instead of using the email. Don't bother with the English, I think everyone here can understand.

That is a very good idea.We will do it.

 

[SMSL-Mandy]

Thanks for the review at first.
And can you change the Brand name VMV D1 for us.
This is the connection picture when we measured.Connect the earthing port to ensure the correct data.

Here.
Looking forward to hear from you.Thank you very much.

 

[gvl]

There is a setting for that. What do you want me to test with that?

I came across comments that ESS chips sound different (better?) when run in sync vs. async modes. It might be interesting to see how things are looking on the objective side of things wrt those claims if you have the time. I suspect there may be differences across USB and SPDIF inputs in sync mode, if you must pick one perhaps then USB? And as for what, hmm, jitter maybe and the dashboard view?

 

[derp1n]

Hello,Whether the sound(sound color) is standard when you measure PHD.

View attachment 15340
This is the real data of SMSL VMV D1 measured by our engineers.Could you like to check it again?
View attachment 15341
Could you like to leave a E-mail for us? Or you can cantact me: [email protected]
Something about the tips to connection of the unbalanced output.Because the output of the VMV D1 is a balanced signal.

What effect does the A-weighting filter have here? Surely it's going to roll off the HF noise shown in Amir's graphs rather significantly?

 

[helloworld]

What effect does the A-weighting filter have here? Surely it's going to roll off the HF noise shown in Amir's graphs rather significantly?

yes, I agree. @SMSL-Mandy ,would you please let your engineer do the test without weighting? Thanks

 

[SMSL-Mandy]

What effect does the A-weighting filter have here? Surely it's going to roll off the HF noise shown in Amir's graphs rather significantly?

A-weighting filter is a filter in the test instrument that conforms to the hearing habits of the human ear.

 

[gvl]

A-weighting filter is a filter in the test instrument that conforms to the hearing habits of the human ear.

This filtering isn't really meant for DAC measurements as far as I understand.

 

[gvl]

yes, I agree. @SMSL-Mandy ,would you please let your engineer do the test without weighting? Thanks

A time-domain waveform would also be interesting to compare with what Amir saw.

 

[SMSL-Mandy]

The test without weighting.

 

[bennetng]

Looks like Mandy suggests a different grounding technique can get rid of those 8kHz spaced spikes from unbalanced output.

Also, I believe the VMV D1 probably outperformed the dScope at least in some aspects already.
http://nwavguy.blogspot.com/2011/02/testing-methods.html

 

[gvl]

The test without weighting.

View attachment 15347

But this is for 48kHz rate, isn't it? The issue found was with 192kHz.

 

[helloworld]

The test without weighting.

View attachment 15347

192khz?

 

[bennetng]

192khz?

Yes, look at the lower right corner of the graph, it shows 96000Hz, means 192k sample rate.

 

[gvl]

Yes, look at the lower right corner of the graph, it shows 96000Hz, means 192k sample rate.

Why? Look at the synchronization frame rate, it was 192kHz in the original A-weighted graph, now it's down to 48.

 

[SMSL-Mandy]

Sorry for the error.
This is correct.

 

[gvl]

I've just realized Amir did say the HF spikes were present at lower sampling rates as well, so I suppose the 48kHz results above are of interest too.

 

[helloworld]

Sorry for the error.
This is correct.
View attachment 15348

Interesting