E1DA Cosmos ADC

[BluegrassDan]

Thank you so much! Yes, it was showing blue lights. I'll go in, adjust the settings, and report back.

I appreciate the help.

 

[BluegrassDan]

All is well. Muted the "primary" fader and it's doing what it should.

How about the low latency headphone situation? Thoughts?

 

[USER]

Does anyone know if it is possible to use the E1DA Cosmos in an IEM measurement set-up with a Gras IEC711 coupler (a third party one if that matters)?

I can't seem to get a high-enough signal on REW to use them, even with the Scaler at max output. Is the output of the "IEC711" coupler/measurement mic just too low for the Cosmos/Scaler or am I doing something wrong? It works fine with my Apple USB-C dongle.

GRAS RA0045 Externally Polarized Ear Simulator According to IEC 60318-4 (60711)

The GRAS RA0045 is an ear simulator with an acoustic input impedance closely resembling that of an average human ear. It includes a 40AG pressure microphone and is individually calibrated with this specific microphone.

www.grasacoustics.com

 

[staticV3]

Does anyone know if it is possible to use the E1DA Cosmos in an IEM measurement set-up with a Gras IEC711 coupler (a third party one if that matters)?

Yes. I did that with a IEC60318-4 Clone coupler->B&K 1704 signal conditioner -> Cosmos APU -> Cosmos ADC.

I can't seem to get a high-enough signal on REW to use them, even with the Scaler at max output. Is the output of the "IEC711" coupler/measurement mic just too low for the Cosmos/Scaler or am I doing something wrong?

Your clone coupler probably needs Plug-in power. Are you currently supplying Plug-in power to your coupler?

 

[USER]

Yes. I did that with a IEC60318-4 Clone coupler->B&K 1704 signal conditioner -> Cosmos APU -> Cosmos ADC.


Your clone coupler probably needs Plug-in power. Are you currently supplying Plug-in power to your coupler?

Ah, thank you for the info. I did not think about supplying power to it as I didn't think the Apple dongle was doing that for whatever reason. I was hesitant to get the conditioner as I thought that it likely adds noise that would make the specific use of the Cosmos redundant. Is there an alternative source of power that simply does that so that I can use the Scaler for gain? Perhaps that's not even a thing.

Now I am curious if the E1DA USB headphone amp is the best solution to this if it provides the best of both worlds, power and specs. I just want to figure out if the apple dongle is giving me a low frequency droop because of impedance issues.

 

[staticV3]

Is there an alternative source of power that simply does that so that I can use the Scaler for gain?

Sure. Just do Coupler->Rode VXLR+->Cosmos APU->Cosmos ADC and enable phantom power on the APU.

Edit:
There's also a VXLR Pro model with transformer balanced output, which however seems to introduce some distortion:

How to use electret condenser microphones with MOTU M2 and REW

I recently acquired a MOTU M2 to facilitate sample-synced averaged headphone measurements with my in-ear microphones (see https://www.farnell.com/datasheets/1653468.pdf and...

www.audiosciencereview.com

 

[USER]

Sure. Just do Coupler->Rode VXLR+->Cosmos APU->Cosmos ADC and enable phantom power on the APU.

Oh, amazing! Thank you so much.

 

[IVX]

Cosmos DAC Lite aka 9039S is released

#903*S | index

e1dashz.wixsite.com

 

[Music1969]

IEC60318-4 Clone coupler->B&K 1704 signal conditioner -> Cosmos APU -> Cosmos ADC.

Can you show how you connect ?

What cables from coupler to B&K?

And what cables from B&K to Cosmos ADC?

 

[KSTR]

I'm trying to flash latest FW into the CosmosADC (non-iso) but the flash tool reports "no device available". The Cosmos is correctly enumerated and visible to other apps like the TweakCosmos app and REW (WASAPI Exclusive)
What am I missing?

 

[staticV3]

I'm trying to flash latest FW into the CosmosADC (non-iso) but the flash tool reports "no device available". The Cosmos is correctly enumerated and visible to other apps like the TweakCosmos app and REW (WASAPI Exclusive)
What am I missing?
View attachment 365769

Try PID: 6012

 

[IVX]

yes, PID: 6012

 

[KSTR]

Try PID: 6012

Sadly, no change. How does one operate that tool? There is no OK button or similar

 

[staticV3]

Sadly, no change.

You can check you Cosmos ADC's PID number in the Device Manager.

How does one operate that tool? There is no OK button or similar

Here's a video showing how to update the firmware:
https://youtu.be/whqLRaJ20ZU

 

[KSTR]

Here's a video showing how to update the firmware:

Sorry guys, why do I need to watch a completely undecipherable/blurry video when two or three sentences of written word would do?

 

[staticV3]

Sorry guys, why do I need to watch a completely undecipherable/blurry video when two or three sentences of written word would do?

The video is in crisp Full HD.
Not sure which part is undecipherable. Please tell me, so that I can assist.

 

[KSTR]

And your response doesn't answer my question. If you've done a FW update, why not share how you did it?

 

[pkane]

View attachment 365800

And your response doesn't answer my question. If you've done a FW update, why not share how you did it?

The Auto button initiates the update, after you find the device and select the firmware file. The video seems to recommend to uninstall and then reinstall the Comtrue driver, first. Last time I did it, it worked without reinstalling and I didn't have to look for the right PID.

 

[Music1969]

The video is in crisp Full HD.
Not sure which part is undecipherable.

Super crisp for me too , here

 

[KSTR]

Thanks, @pkane, that's the needed info. There was no hint anywhere that one would need a driver for Win10.