E1DA Cosmos ADC teardown

[okok]

is it snake oil, like this small?

 

[TNT]

Bigger is better?

I think that specifications speak for themselfs. And it seem to sound fine... of course.

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[TNT]

Referring to the pic in post #30, have a perhaps circled an eventual LP filter? Values of caps?

Or where and how?

//

 

[HpW]

Actually, [email protected]. 0dbfs about 1.8Vrms.

Is there any 0dB input gain settings so no gain nor attenuation's applied? As like to understand the 3.2Vrms as given on spec's

 

[TNT]

Haha - wrong again - my preamp is at gain 1. And this preamp has the mic capsule on its input.

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[IVX]

Is there any 0dB input gain settings so no gain nor attenuation's applied? As like to understand the 3.2Vrms as given on spec's

no, because this is inverting stage.

 

[trl]

is it snake oil, like this small?

You need to be more specific, please.

Referring to the pic in post #30, have a perhaps circled an eventual LP filter? Values of caps?

Or where and how?


View attachment 251700

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Do you want me to measure those caps from the input LPF?

 

[TNT]

Thanks - I got the information form the designer. It was not what I circled

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[TNT]

Anyone managed to make an USB isolator working on the Cosmos ADC? I tried one from Amazon

https://www.amazon.se/Nobsound-isol...b6-b99a-20cb22334e5f&pd_rd_i=B07GF6VMMK&psc=1

but it was a no go. The change of mono->stereo by changing the volume slider on the laptop seemed to work but ni sound - only static...

//

 

[Sokel]

Anyone managed to make an USB isolator working on the Cosmos ADC? I tried one from Amazon

https://www.amazon.se/Nobsound-isol...b6-b99a-20cb22334e5f&pd_rd_i=B07GF6VMMK&psc=1

but it was a no go. The change of mono->stereo by changing the volume slider on the laptop seemed to work but ni sound - only static...

//

You will need a High speed USB2 one,like the Intona's.
They don't come cheap though.
There are eval boards though that are up to the task:

https://gr.mouser.com/new/analog-devices/adi-evaladum4165-evaladum4166-eval-boards/

 

[TNT]

Thanks!

Yes, quite a bit lower - an eval board would be ok. Hmm, which one do I want?

"The ADuM4165 supports the clock or crystal input on the upstream side, and the ADuM4166 supports the clock or crystal input on the downstream side"

I suppose it would be best to let the Cosmos be "master" and take the clock from there - but is this up or down-stream? Don't get it...

Its very good also that this board support individual powering of the Cosmos - it is needed because my Laptop battery is not so good anymore and my phone dont have that much juice.

I hope the EVM would also work between a phone and the ADC - I managed to succesfully connect the Cosmos to my phone using https://www.extreamsd.com/index.php/products/usb-audio-recorder-pro and do proper recordings.

//

 

[Sokel]

Thanks!

Yes, quite a bit lower - an eval board would be ok. Hmm, which one do I want?

"The ADuM4165 supports the clock or crystal input on the upstream side, and the ADuM4166 supports the clock or crystal input on the downstream side"

I suppose it would be best to let the Cosmos be "master" and take the clock from there - but is this up or down-stream? Don't get it...

Its very good also that this board support individual powering of the Cosmos - it is needed because my Laptop battery is not so good anymore and my phone dont have that much juice.

I hope the EVM would also work between a phone and the ADC - I managed to succesfully connect the Cosmos to my phone using https://www.extreamsd.com/index.php/products/usb-audio-recorder-pro and do proper recordings.

//

I would get the 4165 which is available,the other is not till june

 

[TNT]

Aha - so it dosent matter in my case...

I see the possibility for clocks on the board - I suppose one dont have to use this...

//

 

[pkane]

Anyone managed to make an USB isolator working on the Cosmos ADC? I tried one from Amazon

https://www.amazon.se/Nobsound-isol...b6-b99a-20cb22334e5f&pd_rd_i=B07GF6VMMK&psc=1

but it was a no go. The change of mono->stereo by changing the volume slider on the laptop seemed to work but ni sound - only static...

//

I had no luck with Intona's USB 2.0/High speed and Topping HS01 -- neither worked for me with Cosmos.

 

[TNT]

Aha - not even the Intona... wow.. hmm.. what is the problem (with the Cosmos?)?

/

 

[TNT]

The strange thing was that there was indeed some communication possible with the cheap cheap one...

//

 

[pkane]

Aha - not even the Intona... wow.. hmm.. what is the problem (with the Cosmos?)?

/

Don't know. It's detected and shows up in the device list. HS01 even has an external power supply that can be used to provide extra power if one USB isn't sufficient. Yet, I just get noise from the device. I am using this with a Mac.

 

[Sokel]

I think @pma uses (a not high speed) one and it seems to work,maybe he'll jump in to tell us.

 

[mdsimon2]

I think @pma uses (a not high speed) one and it seems to work,maybe he'll jump in to tell us.

He said it doesn't work with the Cosmos -> https://www.audiosciencereview.com/...cs-do-they-sound-different.41363/post-1462127.

- if DM+ would work with OPTO-ISO (I do not know, some soundcards do not, like Focusrite 2i2. Cosmos also does not work with USB-ISO)

Michael

 

[Sokel]

He said it doesn't work with the Cosmos -> https://www.audiosciencereview.com/...cs-do-they-sound-different.41363/post-1462127.



Michael

...and he uses windows,so @pkane 's Mac is not the drawback.
Strange...