Best spec ADC Chip currently.... ??

[IVX]

Grooved, I2S is always On, ES9822 as a master.

 

[MC_RME]

In your AliExpress store there are three bundles available, without any further explanation

I guess bundle 1 is no bundle, bundle 2 includes the headhone load PCB. Bundle 3 greyed out.

So I ordered bundle 1. Will be interesting what I get additional to the ADC itself...

 

[Bamboszek]

@MC_RME, it is explained at beginning of description.

Bundle 1 is Grade C.

Bundle 2 is Grade B.

Bundle 3 is Grade A.

 

[MC_RME]

No, it is not. In all translated languages the first three lines above the pic are removed. I just changed to english to magically see them pop up. Seriously, the common workaround for AliExpress' limited choice selection is to use 'Color' for different models, not the even more misleading 'Bundle'. And one can easily add the description for the choices directly there as well...

 

[IVX]

MC_RME, better to ask Sunny there, she is almost always online in the Aliexpress shop.

 

[MC_RME]

That would be a useless task. Until one gets replies all ADCs are sold out already - QED

 

[staticV3]

On mobile at least, the bundles' explanation is right there.

Spoiler: Browser

Spoiler: App

 

[Bamboszek]

No, it is not. In all translated languages the first three lines above the pic are removed. I just changed to english to magically see them pop up. Seriously, the common workaround for AliExpress' limited choice selection is to use 'Color' for different models, not the even more misleading 'Bundle'. And one can easily add the description for the choices directly there as well...

Oh, that's right. Just checked and it disappears in different languages. I really hate auto-translated version of Aliexpress, and too bad it keeps automatically changing from English.

 

[IVX]

Bamboszek, huh, I believe you didn't see how stupid their seller interface. That's why we had such a delay with Aliexpress shop update for Cosmos ADC. I always laugh when Sunny called Jack Ma "genius"

 

[IVX]

Bundle 1=Grade C
Bundle 2=Grade B
Bundle 3=Grade A

 

[staticV3]

No, it is not. In all translated languages the first three lines above the pic are removed. I just changed to english to magically see them pop up. Seriously, the common workaround for AliExpress' limited choice selection is to use 'Color' for different models, not the even more misleading 'Bundle'. And one can easily add the description for the choices directly there as well...

Like this?

I've asked Sunny if she can change it. Will update once I know more.

 

[Rja4000]

Some measurements of my Grade A - "128dB"
Mono mode, 4.5V range

ASIO4ALL v2.15 Beta 2
ARTA 1.9.4.1 ("Mic" FR Compensation file to limit to 20Hz-20kHz)
Virtins Multi Instrument 3.9 (20Hz-20kHz)

On the left with MI, on the right with ARTA

Open loop

48kHz Sampling rate
FFT with Rectangle windowing, 32k FFT Window size
Above, A-weighted, below un-weighted

Noise is at
-127.7dBFS(A) (both tools give the same value)
or
-125.6/-125.7dBFS (<0.1dB difference between the 2 tools)

192kHz sampling rate
128k FFT Window size
All the rest, same as above

Above Un-Weighted, below A-Weighted

Noise is at
-127.9dBFS(A) (both tools give the same value)
or
-125.8/-125.9dBFS (<0.1dB difference between the 2 tools)

With a 150 Ohm load
(shared accross the 2 inputs), at 192kHz, for both tools

Noise is at
-127.7dBFS(A)
or
-125.6dBFS

 

[IVX]

Rja4000, what about the THD+N? In my try, MI had a huge mismatch.

 

[Rja4000]

I'll re-try with your ADC.

With the RME ADI-2 Pro fs R, I never experienced a mismatch.
But that's with RME native driver.

What I see with ASIO4ALL are some strange behavior though, with both softwares:
At some point, it's limited to <90dB
At some other points, It's blocked at <118dB instead of >125dB (un-weighted)
Then I play a bit (restart the software, un-plug the ADC,...) and it all gets back to normal.
I think it's rather a problem with Windows, the windows driver and ASIO4ALL than with a specific software.

But I'll continue checking.

By the way, at what Range (max V) do you check the noise ?
And do you shortcut inputs ? or keep then open ?

 

[IVX]

I measured SNR with opened inputs but in the 10V range, the difference short/opened is negligible. Try pls FlexASIO 32/384 is supported.

 

[Rja4000]

Try pls FlexASIO 32/384 is supported.

I tried to install FlexASIO several times, but it just doesn't work.
I'll try again.
Do you use version 1.7a ?

 

[IVX]

FlexASIO-1.7a.exe

 

[Rja4000]

Yes. I need to play with config file.

 

[staticV3]

@Rja4000 have you experimented with the Cosmos Tweak program yet? Specifically the ADC_INT_SEL values.
In my case, those improved my SNR:

L: 123.4 -> 123.9
R: 124.5 -> 124.9
Mono: 126.9 -> 127.4

So a .5dB improvement across the board.

 

[Rja4000]

I now have REW working at 384k FFT window size with FlexASIO
Multi Instrument runs at 384kHz as well.

I did play a bit with ADC_INT_SEL, but I didn't get any improvement.
What does it change ? And how did you improve ?