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E1DA Cosmos ADC

sarieri

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@IVX I tried this Amazon cable with Scaler and it doesn't work - I see a lot of distortion.

Anything wrong with the wiring?

Male XLR:

View attachment 353676


and female XLR:

View attachment 353675
We probably got the same Amazon cable. They are not shielded at all.

I get much lower distortion with shielded cable. I believe shielded cable is #1 priority in Cosmos setup. Much more important than battery bank power. I power ADC, APU, Scalar with ldos and can still get pretty much same results as battery power.
 

lemmy_collins

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@IVX I tried this Amazon cable with Scaler and it doesn't work - I see a lot of distortion.

Anything wrong with the wiring?

Male XLR:

View attachment 353676


and female XLR:

View attachment 353675
DO NOT USE THE MALE XLR with the scaler you're shorting differential output all together !!!
The female XLR looks ok but then you need a male XLR to male XLR to end your plugging.
(edit: not seen the previous answers sorry for the thread "spam")
 

nanook

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@IVX : You are referring to TRRS in most cases, even for connections that have e.g. +, -, Gnd, Gnd or +, Gnd, Gnd, Gnd.
-> Would a more common, good quality TRS do as well or would you expect a disadvantage for one of the connections to/from the APU?
 

staticV3

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Would a more common, good quality TRS do as well or would you expect a disadvantage for one of the connections to/from the APU?
For the Cosmos APU, you can use TRS plugs for inputs and TS plugs for outputs.
 

nanook

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Ok., thanks for confirming.
I will use TRS and a decent cable for all connections. I was just wondering because I thought so far TRRS only used for headphone combined with microphone.
 

HpW

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HpW, try walking in my shoes, pls. I a single person do all things simultaneously. Where I can get time to make a custom FW for 22/24MHz osc?

Any news about an updated "TweakCosmosQT.exe 01-Sep-21" as settings are saved and no any guess how mono or stereo is configured??

In other words a valued TweakCosmosQT setup to come
:p
 

HpW

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@IVX , what's up with the E1DA Audio Store, can't find the Cosmos ADC anymore.

Yes, as from Spain as AliExpress side: "Sorry, we have detected unusual traffic from your network."

While today as was MS updating and even on ALiExpress connected.

The windows did result in not completed downloads! In addition BD AV reports: Sorry, we have detected unusual traffic from your network.

In other words: Big brother is watching :mad::mad::facepalm::facepalm:
 

IVX

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Before buying a reel of ES9039Q2M I decided to test 5pcs chips with the particular date code(not the same that I used for protos). The result is a bit better than 5pcs in protos.
MLCK=49MHz THD+N L, R / MLCK=24MHz THD L, R
1 -125.9, -125.9 / -146, -146
2 -125.3, -125.3 / -147, -147
3 -125.7, -125.6 / -145, -148
4 -125.6, -125.6 / -147, -148
5 -125.3, -125.3 / -146, -148
PS: 32/96.
 
Last edited:

JensH

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Very nice performance!

You use two different MCLK frequencies. I assume that you get optimum results for THD+N with 49 MHz and best results for THD with 24 MHz.
Do you know how much you gain by changing the MCLK frequency?

Another question regarding the ES9039Q2M: on the ES9822PRO you found that there was some temperature dependence and you introduced a method to keep the ADC at a constant temperature. Have you seen a similar temperature dependence with the ES9039Q2M?
 

BluegrassDan

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Apr 16, 2024
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Hello, all. I just purchased the Cosmos ADCiso for studio recording use. I have a few questions (forgive me if this has been answered previously and I simply haven't found it.)

1. Running into Pro Tools, the output level peaks at -5.8dBFS, clipping the waveforms. Is there a way to set the ADC output for 0.0dBFS?
2. I'm confused by the "automatic" mono vs stereo. I just want the thing to spit out from each channel what goes in.
3. If one wanted to add a low latency headphone option, is there a recommended product?

P.S. Setting the input with DIP switches is no problem. It's the output that bugs me. Using MacOS, by the way.

Thanks in advance.
Dan
 

staticV3

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1. Running into Pro Tools, the output level peaks at -5.8dBFS, clipping the waveforms. Is there a way to set the ADC output for 0.0dBFS?
Sounds like your Cosmos ADC is in Mono mode.
With a signal present at the XLR inputs, is the signal LED next to the XLR port Blue (=Mono), or Green (=Stereo)?

2. I'm confused by the "automatic" mono vs stereo. I just want the thing to spit out from each channel what goes in.
Here's how Mono/Stereo works on the Cosmos ADC:
Cosmos_Mono_vs_Stereo-1.png

On macOS, you can change modes using the Audio MIDI Control Panel:
Screenshot_2023-03-06_at_17.24.02-1.png

On Linux, use the volume control built into Pulse audio/Alsamixer.

On Windows, it depends on which driver you use.
When the Cosmos ADC is used plug-and-play with Microsoft's generic device driver, then the mode can only be changed using the Cosmos_Tweak utility which you can download on E1DA's website.

Once you've installed the Comtrue driver, you can change modes using the Sound Control Panel, in addition to Cosmos_Tweak.
2022-02-14_23-21-31-1.jpg

On all three OSs, setting the mode once, should always have the Cosmos ADC return to that mode on boot up.
 
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