E1DA Cosmos ADCiso Review

[MC_RME]

I recommend this solution:

Installing the E1DA Cosmos ADCiso in a larger metal housing - supplemented with these external components, for example:
Self-built preamplifier *1) with switchable input sensitivity (the switch from the ADCiso is only suitable for a few circuits), a stereo/mono switch, external XLR sockets, ...
Internal USB-C socket (control) to external USB-B socket. The power supply (USB-C socket) goes to a built-in lithium battery, which also contains a charging circuit.

Here is a version from EUVL:

View attachment 366157
... with balanced output for controlling an E1AD ADC via an OPA1622, both in the same housing

The scaler is unsuitable for me without modification:
- cannot attenuate the signal
- too low max. input voltage

*1)
Some time ago @MC_RME built such a preamplifier and presented measurements in conjunction with the - unfortunately no longer available - "Linear Audio AutoRanger ARII Version 3" ("AutoRanger Version 3 Tech Specs MC JD 6c.pdf").

I did not 'built' this. The unit used by EUVL and described in my pdf is the Autoranger, designed by Jan Didden, published in the DIY forum. I used that unit myself and wrote a technical review about it which explains its functions, tech specs and some limits. Jan liked my text so much that he added it as additional info to the offical (his) manual and website.

Like other people here (John Young, PMA, KSTR...) I also built myself a preamp (fixed gain only) as small box that allows to amplify low level signals and act as impedance buffer, mainly for noise/SNR measurements. The circuit can be done in different ways but is very easy. One can also use microphone preamps (rja4000) as long as their low input impedance poses no issue.

 

[Hemi-Demon]

I live in Asia, my wife is Chinese, and our 3 kids as well. Bruno is a Belgium guy but as I remember with a black wife, regarding Archimago I'm not sure, I never saw him and didn't ask. He could be a black Canadian, I don't care. BTW, I have no idea regarding your nationality too, and my race is questionable for a true racist, I have 1/32 a fraction of Indian blood.

The mods have the right to allow divergent thought, argumentative name calling over technical details, but whew this is outright racism. Let me guess the next thing IVX will post is everything I said was fine and covered because not only do I have a Chinese wife, but I also have Black friends?

Your alleged Chinese wife is fine with you making negative generalizations about Asian people?

You have the right to say whatever you want, but to spew hatred on another person's forum that has helped you to sell your unsupported products is mind blowing.

Banning people is unproductive, but I certainly will never purchase anything from your company based upon your mannerism and inability to support the products you sell. Your choice to be rude, my choice to spend elsewhere.

The mods sure have a tough job around here. How hard is civility in what should be an enjoyable hobby. We all learn more if we continue to engage through disagreements without disparaging each other like this.

This ruined my day. I need to spend more time in the coffee thread to relax.

 

[Bob101]

Most likely you can. You may lose some of the gain of the mic pre if its output impedance is high.

But how much is the input impedance? How low is low?

 

[Groom]

I assume @Groom most certainly meant SPDIF-Output.

Sorry for the typo - my bad . In fact I meant Spdif i/o, instead of USB - to be able to clock it externally.

 

[SSS]

But how much is the input impedance? How low is low?

Input impedance depends on the specific sound-card used in the PC. Maybe the value of the line input is stated in the specs. For a mic pre output the input impedance should be 10k ohm or more.

 

[KSTR]

The mods have the right to allow divergent thought, argumentative name calling over technical details, but whew this is outright racism.

I cannot see any racism in IVX's post you quoted, and we Germans have a bit of experience with racists.

 

[pma]

But how much is the input impedance? How low is low?

Refers to 1 channel balanced input. Halves in mono mode (2 parallel channels), again halves in single-ended mode. It is really too low. You may see crossover distortion from all opamps, above some 10kHz, when they drive Cosmos ADC at ranges <4.5V. See my buffer plots, post #99. Without the buffer, you can see crossover distortion spectrum lines in DX5 measured directly.

 

[capslock]

It is just one of me as well and I rather be preparing more of my raised garden beds than dealing with his insults toward me. This forum gave life to his business. But he thinks nothing of calling me a "manager" who is not "smart" enough to measure things. He needs to learn to bite his lip and be more considerate and take feedback for improving his business. I sure as heck do that by creating all those tutorials on youtube.

In my understanding, the manager thing was directed at the guy who wrote Scalar instead of Scaler and whom he taught to measure on discord. Concur on the lipbiting, consideration and taking feedback!

 

[TimoJ]

In my understanding, the manager thing was directed at the guy who wrote Scalar instead of Scaler

Wasn't that Amir:

E1DA Cosmos ADCiso Review

Why didn’t you make a THD vs frequency measurement? It's very important imho Oops. I had measured it but forgot to put it in the review. it is there now: The dashed lines are with 4.5 volt range.

www.audiosciencereview.com

 

[Sokel]

I've yet to meet an engineer who would also be (at least) decent relating with sales and people.
Specially when it comes to their brain child.

A whole different skill-set which almost never overlaps.
Hence the sad threads now and then.

We all loose by stuff like that.
I don't know what would take,a sincere,humble apology maybe?It takes some guts but is the proper thing to do regardless whatever action Amir will take.

 

[capslock]

Wasn't that Amir:

E1DA Cosmos ADCiso Review

Why didn’t you make a THD vs frequency measurement? It's very important imho Oops. I had measured it but forgot to put it in the review. it is there now: The dashed lines are with 4.5 volt range.

www.audiosciencereview.com

Sorry, I don't understand how your quoting my post and quoting that post go together.

 

[_thelaughingman]

BTW, I have no idea regarding your nationality too, and my race is questionable for a true racist, I have 1/32 a fraction of Indian blood.

Dude, you can stop with your backtracking rooted in your racial identity. Doesn't matter if you're part Indian, married to a Chinese. You have prejudice that you fail to acknowledge, and it doesn't absolve your words that were uttered.

 

[capslock]

Yesterday I suspected that Ivan's placing a Ukrainian symbol on his PCBs had brought a state-sponsored or self-styled internet warrior out of the woodwork, but Ivan has owned up to the posts. Declaring his love of Amir here and bashing him there does not look good. I have to caution that machine translations are poor at register and nuance (deepl is a bit better in that regard than google) and negiotiating context is something that is even difficult for humans who are fluent in both languages in question. I don't speak Russian but I get the impression from translations of interviews, published and translated intercepted communication and from trying to understand technical conversation on diy internet fora (unfortunately) via machine translation that communication and internet culture is a lot more colorful, maybe outright adolescent / puerile than what we in the West are accustomed to. This may be akin to US subcultures where you would call your best friend a SoB or MF. So whatever he wrote there should be taken with a grain of salt.

At the same time, what is acceptable there (or maybe even needed to maintain a certain street cred) should not creep into posts here where it will be considered confrontational.

I cannot see any racism in IVX's post you quoted, and we Germans have a bit of experience with racists.

I think he was referencing this post by Amir which had some machine translations from a Russian language post by IVX:
https://www.audiosciencereview.com/.../e1da-cosmos-adciso-review.54020/post-1961775 "... how much Asianness there is in this, you would know. I'm not racist, my wife is Chinese, but Amir's behavior is purely Asian."

That is pretty bad in my book. The justification that he can't be racist because ... also does not sit well here.

Again, it may be a cultural thing. The guy who runs hificompass and who has been doing a great service to the audio community got into trouble over at diyaudio AFIR for what was perceived as a racist comment and certainly was not PC by Western standards. He didn't get the point and started arguing that as a Russian speaking jew from Kharkiv he couldn't possibly be racist, and back when there was still a Soviet union, people had all kinds of nationalities and called each other names and that wasn't racist.

So again, we shouldn't be judging too harshly what is going on there but that kind of talk or justification has absolutely no place here.

 

[USER]

Wow. And here I thought that I had already read the stupidest thing that would be posted on this site this year. And, sorry, this is a brainless statement in any culture or language.

Why is it that the people who tell you they are the smartest in the room in the loudest and most obnoxious way always end up with their pants down? And worse still, how the hell do we get here in a golfing panther review thread??

I know everything is falling apart and we are all stressed and whatever bad traits we have tend to flare up in these moments. But any modestly intelligent person would see that times like these show us how unimportant our own fragile egos are. Try therapy. Try meditation. But most importantly, have some f***ing grace and try to be a nice person.

 

[pma]

You guys talk too much.

 

[undeakyetonde]

Re: russian forums. It is true that what Ivan wrote wasn't very respectful, but reading too much into it is a mistake. Things routinely said over there would be considered rude, toxic and plainly unacceptable on majority of english-speaking forums. People can talk like that to each other for years and consider each other buddies and friends. It is a much much more direct and confrontational culture, and border between banter and insult is not where you assume it is. Keep that in mind if you ever want to google translate something from russian forums and social media. Especially technology related.

Re: racism. It's futile to explain contemporary 'western' understanding of racism to a person who grew up in Soviet Union. Average ex-ussr understanding of the term racism is not that different from what a Trump voter thinks. Don't bother, you'll just end up calling each other brainless and stupid, and not as banter.

 

[undeakyetonde]

Re: personal vendetta - yeah, looks like it. More like стукачество though

Ну что, привет Ванячка, ничего личного, просто мы в разных лагерях, учитывая твой статус и гравировки "вилок" на платах

"Soo, hello Vanechka[1], nothing personal, it's just we are on opposite sides[2], considering your status[3] and engravings of "forks"[4] on PCBs"

[1] a form of name Ivan (Vanya, Vanechka), in this context it reads as overly familiar, mocking, like talking to a child
[2] apparently refers to war in Ukraine
[3] idk what exactly 'status' means, probably something personal
[4] evidently this is a derogatory term for Ukrainian coat of arms

Overall it shows some previous conflict between user Another_Moon and IVX. What a load of bollocks.

 

[Another_Moon]

Re: personal vendetta - yeah, looks like it. More like стукачество though

"Soo, hello Vanechka[1], nothing personal, it's just we are on opposite sides[2], considering your status[3] and engravings of "forks"[4] on PCBs"

[1] a form of name Ivan (Vanya, Vanechka), in this context it reads as overly familiar, mocking, like talking to a child
[2] apparently refers to war in Ukraine
[3] idk what exactly 'status' means, probably something personal
[4] evidently this is a derogatory term for Ukrainian coat of arms

Overall it shows some previous conflict between user Another_Moon and IVX. What a load of bollocks.

Vendetta? Then greetings from Mr. Salieri. And this is not snitching, because he and I are not in the same boat)
As for [3], by status I meant his inscription on this forum in the location column - there is a Ukrainian nationalist slogan (https://ru.wikipedia.org/wiki/%D0%A1%D0%BB%D0%B0%D0 %B2%D0%B0_%D0%A3%D0%BA%D1%80%D0%B0%D0%B8%D0%BD%D0%B5!).
But I agree with your words about racism in the CIS countries, under socialism nationalities and races were friends, and here no one has hatred for another race, only rather genuine interest and surprise in something new that you rarely see.
P.S. Are you interested in conducting an investigation and inventorying the evidence?

 

[undeakyetonde]

So, it's even simpler. Doesn't make it any less petty and disgusting

I hope everyone can see that wasn't done out of genuine concern about honesty or about audio science...

 

[Another_Moon]

So, it's even simpler. Doesn't make it any less petty and disgusting

I hope everyone can see that wasn't done out of genuine concern about honesty or about audio science...

Yes, yes, I provided facts, information that is the main resource of science, but you didn’t like it, so I’m “not scientific” and “not sincere” (by the way, a good combination of words turned out to be in English).
What is not clear in this formula? I initially had some kind of personal hostility towards the person, then I saw a conflict with this person, and decided to present data that I had known for a long time, there was simply no point in advertising it somewhere, so I collected this information and presented it here for consideration.
As you can see from the signature, I myself had an E1DA DAC, and as a product I had no complaints about it (well, except for minor ones, for example, the very concept of a large whistle is not very convenient, but I used it with a laptop, and the moment that sometimes when you touch it while working, a “boop” effect occurs).
I don’t see the point in spreading this water further, if there was a communication thread, then maybe, but this is a review, so it’s not worth it.