I have to apologize for my non-native English, and non-literary style. I just want shortly and not too boring to describe what I know about that ADC. Notice the single USB-C connector, there's a small amber LED that blinks when in use. The blinking rate is dependent on the sample rate: 48kHz = 0.5Hz (1 blinks/2s), 96kHz = 1Hz, 192kHz = 2Hz, 384kHz = 4Hz, and the 44.1kHz family blinks slightly slower by about 10% (ratio 44.1/48 x frequency). as an example, I see some clue of IMD at intermediate level in mono mode. To be true, this is because noise is so low, so not really a concern) To start, let's just talk about the general principles around use of this device before we jump into actual measurement examples. Before running any "experiment", it's important to set the foundations first before capturing data to make sure we've thought through what's needed and how to "control" for potential variables. Of course, you mitigate this issue with the APU, anyway (APU has a 47k ohm input impedance. E1DA ADC has around 840 ohm input impedance for 4.5V range in mono)

This applies for most countries. However, large items such as headphones and desktop DAC/AMPs (e.g. HarmonicDyne G200, MUSICIAN MDP-2, and etc.) are excluded. Even though I show those extra frequencies, the THD+N measurement applies filtering between 20Hz to 20kHz so that 24kHz noise will not be applied to the final calculation (as you can see, the areas beyond 20-20kHz on either end faded out to indicate this). With a -60dBFS 1kHz signal, the harmonic levels are extremely low, so the |THD+N| result is basically a reading of the full RMS noise level which we add 60dB to to get the dynamic range - this summed amount is why we see a number like 123.9 rather than something lower as you would see with each frequency in the graph being down -130dB or less. From that perspective the Cosmos ADC is not an ideal choice for this use-case, as you need an additional box to make it work well. Compared to the typical Audio Precision graphs you see online (like ASR) which often measures at 44.1kHz, I like going the "hi-res" route and will usually show my FFTs based on a 96kHz signal. I'll usually show near infra/ultrasound on the FFT as well (down to 15Hz and up to 30kHz) just in case folks have massive subs and even super-tweeters ;-).In comparison, the Audio Precision is like having all that together, and way more: the 5.6 version of the 800mm, a 11-24 zoom, and all the best intermediate wide aperture fixed focal lenses. Accidents, abuse, misuse, improper installation, problems with electrical power, acts of third parties. Experimental RIAA EQ FW CosmosAdc_v13_RIAA.h e x The middle of ADC volume slider activates the RIAA EQ , from summer 2023 all new units use FW with RIAA Windows 10 doesn't need the driver but Windows 7 does and the driver installation may require manualinstallation. So, if you are not ready for that the good idea just update W7 for W10. The switch positions of the ADCiso (6.7V to 10V tested) play no role in the 6 dB difference between the relevant voltage values.

The default numbers for 2nd and 3rd harmonics were calibrated prior to the unit being sent to me to correspond to results on the Audio Precision SYS27XX with a -0.5dBFS signal. You can also change which filter setting is applied to the ADC channels; "Linear phase apo" and "Linear phase fast" both worked well in my testing. E1DA Cosmos ADC is a high-performance Analog-to-Digital Converter that can be used for measurements of ultra-low THD+N signals or calibrating Desktop DAC's for minimum distortions. E1DA has professionally designed the Cosmos ADC with premium ESS Sabre ADC Chip. It can also be used to measure the performance of high-fidelity desktop DAC systems with great precision. High-Performance ADC Chip From Sabre Technologies:- A couple of days ago I noticed that during the calibration Cosmos ADCiso has no green/blue/red LEDs indication, in about 30% of cases.Overall, the ADC offers outstanding value, both in terms of product design as well as high manufacturing quality. To my knowledge, this is currently the best performing ADC on the market. The only things that could be improved is the 2.5mm TRRS connector interface and the documentation. The high level input is a very important feature for me and therefore I'm going to use this connector most often. I have serious concerns with 60V on a tiny 2.5mmTRRS connector that may cause catastrophic failure in case this is (dis-) connected with signal present. Almost perfect white noise spectrum, with only a bit of low frequency rise. The chart starts at 2Hz so performance is better than it looks at first glance. With these settings the white noise is -187dBFS at 1kHz. The high level input is extremely useful and one of the reasons I bought this device, but the 2.5mm TRRS interface is difficult to deal with in my opinion. I would prefer to have high level input on the XLR connectors instead. Ideally, multi-device support in REW with WASAPI and/or ASIO natively would be fantastic. I must say that despite the age of WaveSpectra, it's quite impressive how well it handles the hodgepodge of audio driver variants in Windows! On top of that, the addition of +48 V phantom power will make the Cosmos APU, chained with any ADC, in my case it’ll be Cosmos ADC, a top notch combo for any compatible condenser or dynamic microphone out there. Basically, there haven’t been manufactured yet an audio interface having a better performance than the above combo, and I’m referring now strictly to THD+N and dynamics. In terms of gain, the +60 dB pre-amplification will match the max. gain of my Motu M4 and will even outperform Focusrite Clarret’s +57 dB of gain, meaning that Cosmos APU + ADC combo can be successfully used with low-sensitivity mics like AKG D5 and Sure SM7B.

You must return an item in the same condition as it was received. You must also include, in the same condition as it was received: A) We offered our 9038S/D DACs users to control the distortions performance of those DACs with the TWEAK9038 Android app. Device Purpose/Marketing Target: Ultra-low THD+N Analog to PCM Digital Converter For Audio Measurement, E1DA 9038S/D DACs users, DIYers, Audio Tech Bloggers-reviewersThis warranty extends only to personal use & does not extend to any product that has been used for commercial use, rental use, or use that is not intended. There are no warranties other than expressly set forth herein. Currently, E1DA is a very small family run business. The products are developed by the owner, Ivan, who is certainly a highly competent engineer with passion and high performance in mind. Manufacturing is outsourced to EMS partners. This is exactly how I would run such a business. I find the company more personable than some huge public limited that only cares about investors profit instead of customers value. E1DA products offer excellent value for the money, especially considering the low sales volume, which makes manufacturing more expensive. Supporting a small business and family certainly feels better than feeding the bottomless, greedy hole of a soulless corporation.

Like any precision measurement instrument, the ADC can be calibrated. There are two options to calibrate the ADC: There is an app for devices running AndroidOS and another software which runs on Microsoft Windows.

Apple cancelled this, now what?

Input Range: 1.7Vrms 640Ω, 2.7Vrms 1kΩ, 3.5Vrms 1.3kΩ, 4.5Vrms 1.66kΩ, 6.7Vrms 2.46kΩ, 7.6Vrms 2.82kΩ, 8.5Vrms 3.12kΩ, 10Vrms 3.48kΩ, 43Vrms 13.6kΩ. If you're wondering about the E1DA name, as explained by Ivan, it comes from the pronunciation of "Ivan" as sounding like "E1" in Russian as opposed to the Americanized "Eye-Ven". "DA" as in "dah" ("да", "yes") - so it means "Ivan Yes".] I bought the E1DA Cosmos ADC as part of my audio measurement equipment because it shows very good performance figures and is designed for this application. Of course, the ADC is also useful for any other ADC application requiring high performance. There are two color changing LEDs right next to the XLR connectors, which indicate whether the ADC runs in stereo or mono mode. THD@[email protected] BW 22-22kHz<.00003%(.3-.2PPM) typical for 32b/48kHz all harmonics level -135-145db