Cosmos APU a notch+LNA $70 to outperform APx555b for $30,000

[HpW]

No, my son and coder Tyoma escaped from russia to Armenia last March(it is about putin's war), and can't work for me anymore.

So happy $30000 product , usual some coders escape with the laptop in hand... so no China coders to jump in?

 

[IVX]

So happy $30000 product , usual some coders escape with the laptop in hand... so no China coders to jump in?

"Happy" Cosmos APU product has no any SW involved, purely analog processing.

 

[TNT]

Now using a W7 computer.

Still cant succeed.

What is an alternative way please?

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[TNT]

Manual way seem to require .inf files but these are not available in the download you pointed to as this is an .exe file...

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[IVX]

what I see in my W10 is that folder:

 

[TNT]

When I unrar that file I only see: SXW_setup_WHQL_20210429-1.exe

Is there a way to see whats inside a .exe?

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[Ultima Thule]

Try viewing/extracting the exe file with 7zip or other archiver sw.

 

[IVX]

When I unrar that file I only see: SXW_setup_WHQL_20210429-1.exe

Is there a way to see whats inside a .exe?

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As I remember, the .exe anyway will create the folder I mentioned. The only thing you need to allow is permission to install that without a digital signature(the Comtrue driver isn't signed).

 

[TNT]

Try viewing/extracting the exe file with 7zip or other archiver sw.

Thanks - I now managed to see the .inf files etc

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[TNT]

I did press F8 at startup and choose the option to disable signed driver check.

Still, att end of ISP tool installation where it asks you to plug in the ADC, it just repeats "Plug in the ADC"....

Doing cancel still also ends with Succeded/Installed.

Trying the ISP toll and changing to 6012 -> no device is available...

:-/

With which tool do one see what FW is loaded in the Cosmos? I cant see any such filed in any of the two programs/tools.

In the Tweak tool, which works, what is ADC1-ADC4?

What is "ADC_INT_SEL"?

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[TNT]

OK - not only needed I to install with signing deactivate - of course also when after restart, I need to run the computer again with sign check off.

Now I can see a green field and Device 6012 exists.

Update succeeded

But how can one see what FW is loaded?

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[IVX]

You can not see that but the latest FW CosmosAdc_V13_RIAA_768_phase.hex has RIAA EQ if the ADC volume slider at the middle(Max - mono, Min - stereo mode). The original FW was CosmosAdc_V13.hex with no RIAA.

 

[TNT]

It's Output volume - right? (Cause there is also an Input volume slider looking with Mac OS)

Changing the slider in the Tweak-tool, does it set this Mono/RIAA/Stereo permanently?

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[mahtew]

Hi, i have a question not directly related to Cosmos APU, but regarding Cosmos ADC.... what would be the best method to measure BTL/PBTL amps with COSMOS ADC?

I saw an advice to use capacitor bypass on each wire here on DIYaudio, and on other web sites
https://www.diyaudio.com/community/...urements-with-rew.338511/page-15#post-5925805

i'd be grateful for any help

 

[IVX]

It's Output volume - right? (Cause there is also an Input volume slider looking with Mac OS)

Changing the slider in the Tweak-tool, does it set this Mono/RIAA/Stereo permanently?

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yes, Cosmos ADC memorizes the last received UAC2 volume command, however, Windows resend all sliders positions every time your device is connected to the USB port. So, you may see a different state of the slider.

 

[IVX]

Hi, i have a question not directly related to Cosmos APU, but regarding Cosmos ADC.... what would be the best method to measure BTL/PBTL amps with COSMOS ADC?

I saw an advice to use capacitor bypass on each wire here on DIYaudio, and on other web sites
https://www.diyaudio.com/community/...urements-with-rew.338511/page-15#post-5925805

i'd be grateful for any help

Hello, Cosmos ADC has AUX input 2.5mm TRRS which will clip at 35-43Vrms(depending on ADC gain setting 1.7-10Vrms). For most cases, it should be enough but if you gonna measure >462W@4ohm, then you need such an external divider you mentioned.
BTW, if you did buy the Cosmos load-board, you can use that as a more convenient extension than 2.5mm TRRS plug. Be careful and do not plug/unplug AUX input if the DUT-amp is turned On(to avoid shorting).

 

[Sam1964]

Hi, I have a question about using Cosmos APU with Asus Xonar U7 MKII. Were measurements taken? Cosmos APU for ADC Asus Xonar U7 MKII will be just as good?

 

[IVX]

Hi, I have a question about using Cosmos APU with Asus Xonar U7 MKII. Were measurements taken? Cosmos APU for ADC Asus Xonar U7 MKII will be just as good?

Well, Cosmos APU Notch will improve your Asus harmonics resolution for 30db, in the case of Cosmos ADC, with typical H2<-140db and H3<-135db, has resolution <<-160db(if the particular APU also would have <<-160db, usually -150-160db). I have in my drawer such Asus but quite heavily modified with H2&H3 -125db, hence such ADC will not be a bottleneck for the APU with H2&H3 -150db, and you'll see exactly the same results as with Cosmos ADC. If your Asus has H2&H3 about -110db(I don't remember how bad is original ADC, just guessing), then you can't see distortions <-140db and so on. If you asking about the noise performance, there is no problem with any ADC, including the internal audio input of your laptop, all of them will show the same result of SNR or DR due to Cosmos APU LNA having a gain of up to +60db. I can't give you the exact link but you can find it in the ASR forum I posted the result of my laptop+APU combo, and it was better than my AP SYS2522 at least.
PS: I want to mention one more option, especially if you got Cosmos APU as an uncalibrated PCBA. You can try to adjust the notch ratio higher than -30db, probably -35-40db is ok but it depends on the particular APU unit.

 

[Sam1964]

If your Asus has H2&H3 about -110db(I don't remember how bad is original ADC, just guessing), then you can't see distortions <-140db and so on.

My ASUS Xonar U7 is also slightly upgraded (other op amps, keys removed), but the noise level prevails. Next will be replacing cs5361 with cs5381.
Does it make sense to buy Cosmos APU? I'm more interested in general SINAD.

 

[TNT]

In the Tweak app, 4 ADCs is identified - how do these ADC 1..4 relate to R and L?

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