IVX
Major Contributor
I prepared the new FW with compensated DC offset, typical 30uV/1V.
I prepared the new FW with compensated DC offset, typical 30uV/1V.
I assume that explains this in my measurements:
View attachment 163110
So, yes, while I can filter that part in software, it would be better to have a much smaller DC component in the ADC used for measurements, to answer your question, Ivan (@IVX ).
Great news!I prepared the new FW with compensated DC offset, typical 30uV/1V.
Thanks. Is it possible to roll back to the actual firmware if needed ?But pls remember, the FW contains a few fixes:
1) the absolute phase is corrected from 180 to 0. Due to the 2nd harmonic is always about the system symmetry, that fix may affect the 2nd harmonic level
2) iOS power fix, some Chinese users like to use Cosmos ADC with iphone/ipad
3) DC offset fix
I'm astonished nobody mentioned that the ES9822Pro includes SPDIF Out. I miss syncing capabilities too. If that output would be available I could at least let the Cosmos be clock master for computer and DAC. And it would even be possible to use the Cosmos stand-alone, via SPDIF out only. According to the data sheet a simple TOSLINK transmitter would be enough to get that, no further data conversion or buffer circuits are needed.You'll need to connect those signals to an AES/EBU transmitter such as Texas Instruments DIT4192 or Cirrus CS8406. Both of these require a master clock at 128 or 256 times Fs. This can be generated from the word clock using a clock multiplier, e.g. the Cirrus CS2300-03. You'll also need power supply, output transformer, and some passive components. Maybe there's a ready-made board available somewhere.
I was thinking that if THD compensation has to be re-done, it would be interesting to go back and compare.I don't see why you want to go back, the firmware seems stable and improved. It would be interesting though to hear which DC values are measured now 'in the field'. I gave my numbers already.
That would be a clear added value.let the Cosmos be clock master for computer and DAC
Now the issue with ESS ADCs is that their included High Pass, which they dared to rename DC Block in their latest data sheets, is a sloppy implemented 25 Hz filter
I saw that too and I'm trying to find the easiest DIY solution to get digital output + Word clock. Will do some test soonI'm astonished nobody mentioned that the ES9822Pro includes SPDIF Out. I miss syncing capabilities too. If that output would be available I could at least let the Cosmos be clock master for computer and DAC. And it would even be possible to use the Cosmos stand-alone, via SPDIF out only. According to the data sheet a simple TOSLINK transmitter would be enough to get that, no further data conversion or buffer circuits are needed.
But pls remember, the FW contains a few fixes:
1) the absolute phase is corrected from 180 to 0. Due to the 2nd harmonic is always about the system symmetry, that fix may affect the 2nd harmonic level
2) iOS power fix, some Chinese users like to use Cosmos ADC with iphone/ipad
3) DC offset fix
The iAP interface is supposedly something that Comtrue added to their bridges to solve a bug with Huawei devices. It has absolutely nothing to do with using the Cosmos on Windows and doesn't impede usability or performance in any way.View attachment 163179
View attachment 163180
Ivan, any idea on how to get rid of those two errors from above? Although I installed Cosmos ADC driver (and ADC works perfect) I still get this iAP Interface issues in Device Manager. Also, FW upgrade software doesn't see my ADC.
What an I doing wrong, please?
Have you tried disabling "detect device" and turning it back on?Thank you! Auto asks for 2fc6 with 6013, while my ADC has 2fc6 with 6012. I've manually entered 6012 on the PID field, but still "USB device not available".![]()
it seems you have no Comtrue driver installed.Thank you! Auto asks for 2fc6 with 6013, while my ADC has 2fc6 with 6012. I've manually entered 6012 on the PID field, but still "USB device not available".![]()