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As you can see, Windows will list up to stereo 32/384 PCM capabilities. I didn't test this with Mac or Linux which I believe should work fine.
Hear me out -- A Wearable Stereo - oladance OWS Pro
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) The second and biggest half of Cosmos APU is the 1/10kHz active notch filter with -30db ratio(Q about 50) at the fundamental frequency and nearly 0db at 2nd and 3rd harmonics i.e. you can simply divide by 30(or subtract 30db) the THD/THD+N result to get a normal value. Also, with REW or Arta, you can use a calibration file to normalize the notch's frequency response and observe FFT results directly. The max balanced input level is 10Vrms, it is also clamped but by the active clamp with opamp's rail voltage-1V, hence, 10ohm 0603 again may be burned like a fuse. The residual harmonics of the distortions are <-150db@1kHz or <-130db@10kHz, that's probably isn't too spectacular but still better than APx555. The residual THD+N, practically achieved one, -132db@1kHz@10Vrms(DAC+LPF approach), calculations based one is -134db but I can't confirm that so far because of can't find a perfect-zero-noise sine for that It is clear that APU is kinda a microscope for your ADC, even any laptop audio input with APU gets the ability to measure a tiny noise of DACs or LDOs, and distortion levels are perhaps lower than AP SYS2722 or even Cosmos ADC.
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 ;-). Remember my unhappy observation about the Topping E50 performance as a test signal source? E50 Whining 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!If you just need low distortion measurements or are fine with doing noise calculations by hand it might be worth waiting for the APU to release. It'll probably be cheaper than the Cosmos ADC.
While the Cosmos ADC is capable of greater resolution used on its own, when paired with the APU, the RME is more convenient with its user interface and better on-screen information. For example, the ability to change input reference levels between +4/+13/+19/+24dBu along with the RME's auto-adjust levels feature when input gets too high are very nice benefits. I have tested the E1DA ADC on 4 different computers, including a laptop running on battery, and with different operating systems (Windows 10 pro 64-bit, Windows 7 ultimate 64-bit and 32-bit). This is especially true for Frequency response measurements, where some specific signal may be used if that's the case.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. use not following the ‘User Guide’ or any additional safety, use, or warnings included in the product materials. From a technical point of view, I understand that the high level input is on an extra connector because in case that would be on the XLR inputs and the attenuation settings were wrong, the ADC could be damaged. With the compact chassis size there is probably no better solution. 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:- As indicated on the enclosure, one can change the input level for each left and right channel. If you've measured DACs before, you've probably seen that many balanced outputs are 4Vrms so the 4.5Vrms configuration would be a good one to use that optimizes potential dynamic range for such devices.
to connect Cosmos ADC to the Load board we prepared the XLR probe cable. It is a 1/2m short a decent quality shielded cable(a lot of copper!) with two hook-clamps(red-POS and white-NEG Inputs) and one crocodile-clamp(GND) on the DUT end.
QUESTIONS & ANSWERS
If you can afford it, the RME, especially with the APU when required, remains the top choice for measurerments, IMO. Customers are to bear the consequences and fees incurred, if the parcel was undelivered due to any of the following situation:
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