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E1DA Cosmos ADCiso Review

Rate this ADC:

  • 1. Poor (headless panther)

    Votes: 4 2.6%
  • 2. Not terrible (postman panther)

    Votes: 1 0.7%
  • 3. Fine (happy panther)

    Votes: 15 9.8%
  • 4. Great (golfing panther)

    Votes: 133 86.9%

  • Total voters
    153
I think the "problem" is that REW "sees" the ADC, instead JRIVER has a virtual input that is seen by Windows, so the ADC enters in Windows which then forwards it to Jriver as an output device.
IMO that's what I talked about in https://www.audiosciencereview.com/...smos-adciso-review.54020/page-18#post-2174997 . While REW can capture directly from the ADC (using Wasapi exclusive API), JRiver likely has no Wasapi exclusive support and captures the "standard" way via windows mixer. You need to ask at JRiver how they do it, they are the ones who got your money :)
 
Maybe something diff in J-River going on, but with non-Wasapi MME API, you can set the sample rate and bit resolution that Windows will convert to , if necessary, in its sound settings. Go into Sound Properties for the DAC and/or ADC (and "more properties" as needed) till you get to advanced properties for 'shared' devices. If you set that to the same rate+res that your sound app is set to use no conversion needed so data should be unmolested. Or at least it has been in my use with my own software.
But if you try to use, say, 24/192, but that Windows setting is at a default such as (often) 16/48 you'll just get that resampled and expresses as the 24/192. With some USB record devices like USB mics the default can also be monophonic, so you may need to change that too.
 
I bought an E1DA ADC and use it to listen to my vinyl records.
I have a phono preamp, so I convert the signal with E1DA, go into the PC
Have you checked the phono preamp for HF noise between half PC sampling frequency and ADC low pass analog filter?
Lets say between 50k and 200kHz?
REW with 512k sampling could be used.
If there is noise it will be folded back into audio spectrum.
 
So important to use a sample frequency that corresponds with analog ADC filter for a clean recording of the analog signal.
RIAA with high gain might or mighth not have high HF noise
 
@IVX I see from the pictures of the PCB that the Cosmos ADCiso has a I2S interface.
Is it possible to use it without streaming audio through USB?
Lets say send commands to the firmware with simple USB MCU and stream audio through the I2S interface into the I2S interface of the MCU or a DSP
 
Hi!

Not sure if this question has been answered before here but Google won't help me.

I'm using the Cosmos ADC Iso to digitize LP.

Phono preamp is a Pro-ject Phono Box DS3 B connected to the Cosmos ADC with XLR cables. Phono cartridge is a Clearaudio Concept V2 MM with 3.3 mV output. Gain on the preamp phono stage is set on 45 dB so 51 dB with the XLR output. That means output voltage is of 1170.88 mV.

Impedance source should be somewhere between 100 Ohms and 600 Ohms (I can't find the exact specs of the output impedance on the Phono Box DS3 B).

My question is: what would be the optimal input range / impedance for that system? It's currently set up on 4.5Vrms / 1.66kΩ.

My guess is that I should go for the highest input range / impedance (10Vrms / 3.48kΩ) but won't I lose sensitivity and dynamic range with this settings? Before messing with the parameters I would rather take some advice.

Thanks :)
 
Hi!

Not sure if this question has been answered before here but Google won't help me.

I'm using the Cosmos ADC Iso to digitize LP.

Phono preamp is a Pro-ject Phono Box DS3 B connected to the Cosmos ADC with XLR cables. Phono cartridge is a Clearaudio Concept V2 MM with 3.3 mV output. Gain on the preamp phono stage is set on 45 dB so 51 dB with the XLR output. That means output voltage is of 1170.88 mV.

Impedance source should be somewhere between 100 Ohms and 600 Ohms (I can't find the exact specs of the output impedance on the Phono Box DS3 B).

My question is: what would be the optimal input range / impedance for that system? It's currently set up on 4.5Vrms / 1.66kΩ.

My guess is that I should go for the highest input range / impedance (10Vrms / 3.48kΩ) but won't I lose sensitivity and dynamic range with this settings? Before messing with the parameters I would rather take some advice.

Thanks :)
600ohm output is really awful option. I guess you need Cosmos Scaler for your phono preamp.
 
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