- Thread Starter
- #81
Need to have iterative sweep support to get things like this:What do you have in mind?
Need to have iterative sweep support to get things like this:What do you have in mind?
So? How is that our problem?I do all things by myself, design, calibration, assembling, and online support in the discord.
I don't know who the heck you are talking about. If it is me, teaches me to not make an exception again in testing your stuff. You badly need to keep your arrogance in check.When the user mixes up scaler vs scalar, I see that he's not an engineer or DIYer but just a manager who accidentally got my stuff and has no idea what is it. I have no time to explain basic things, so I decided I'd sell my stuff to smart people only.
John is an incredibly nice and generous person. He is not at all like you. If you were 1% as nice and appreciative as him, it would be a massive improvement.PS: I recollect another example of a similar approach i.e. the product is wonderful but not easy to use without spending some brain effort and forum reading. REW - typical DIYer2DIYers SW! I was shocked at how fast John reacted to my complaint about REW calculating the THD+N incorrectly, John instantly found the solution, maybe within 24 hours if my memory serves well. I don't think that John has a huge money from his REW, just he can improve the product and doesn't wait for another reason to start his work. When somebody asks me to mod FW for them or so, I recollect that good example and push myself to do help rapidly. We are from the same planet, I guess
Amir, may I humbly repeat my question: what generator did you to test the high performance mode of your AP?Amir, what kind of signal generator did you use to test the AP's ADC in high performance mode? To the best of my knowledge, the AP's analog signal generator does not have HHD < 160 dB, nor do the digital channels.
Do the generators used for the IMD tests change when subjected to a low impedance load? There was some discussion about the ESS hump in Cosmos ADC either here or on diyaudio. The ADC was driven from another ESS DAC. It turned out the hump decreased substantially when a Cosmos Scaler was added. The interpretation, AFIR, was that Cosmos ADC was loading the DAC so much it brought out the hump in the DAC.
This...When the user mixes up scaler vs scalar, I see that he's not an engineer or DIYer but just a manager who accidentally got my stuff and has no idea what is it. I have no time to explain basic things, so I decided I'd sell my stuff to smart people only.
...This type of mindset & speech is absolutely unsuitable for such a (great) place as ASR.
IVX: Yass but what is "smart people"? We're here for numbers so I think on every [e1da] product page there should be exact IQ value of potential customer specified so to not cause purchase regrets. We had monetary elitism in high-end audio, so intellectual elitism is great approach to make objective "price independent" audio more inclusive..I have no time to explain basic things, so I decided I'd sell my stuff to smart people only.
The high performance analyzer turns on a secondary ADC which just measures the main tone and then subtracts it out from the signal. That way, the primary ADC is just measuring the noise/harmonic distortion which is at far too low level of level to cause any non-linearities. As a result, you basically have no distortion in the analyzer as you can see in the FFT.
This...
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...This type of mindset & speech is absolutely unsuitable for such a (great) place as ASR.
The very purpose of ASR is all about highly competent people wanting to share their technical knowledge and educate others. I'm sure that's what @amirm had in mind when he created this forum.
Whatever how skilled you are (and your are), how performant your products are (and they are), you are definitely lacking in that regard, Ivan.
VF, out.
is it possible to use other software like mt from pkane, virtins , or rew , "asio" , with quantasylum? or only quantasylum software?The distortion of the AP may be lower, but its THD+N is limited by the noise, not the distortion, whereas the Cosmos is limited by its distortion, not the noise.
Cosmos is an incredible achievement for very little money from one man. If you can be bothered with the messing around, calibrating levels, considering the input impedance for each range and then using an external high quality D/A converter and random free (or paid) software. Add to that, the need to buffer/precondition and attenuate externally and it's certainly not a turn-key solution.
I have a Quantasylum QA-403 which solves all those issues, including having inbuilt range switching for the generator and the analyzer, a standard 100k/200k input impedance as well as having the A/D and D/A synchronized on the same clock. It is also now fully isolated. Sure, having a 200k front end means I throw away 10dB of THD+N, but that doesn't matter for what I do and when the numbers are already down to >-120dB loopback THD, and +N numbers better than -110dB it's perfect for me as a small, mobile analyzer that just works.
It will not compete with an AP and neither will the Cosmos setup.
The QA40x Software is continuously evolving and Matt from Quantasylum is very much on the ball with minor bugfixes/features and add-ons. Just since September 2023, there has been 8 (eight) complete version updates to fix/improve things. It will run on any machine- I even ran it on a 10+ year old Intel Celeron NUC and a cheap Lenovo Pen ;-)tium with no problems.
I answered already. It is the high-performance analog generator in APx555. You will never get such low distortion if you use the DAC generator.Amir, may I humbly repeat my question: what generator did you to test the high performance mode of your AP?
Oh it was. He is talking about me. Same thing he did when I tested his last product. Both times I gave his product the best recommendation I can give and yet, he spits out this kind of poison. I have a short list of companies that I want to have nothing to do with and he was on it. But I decided to give it a second chance only to see a repeat. Like the other people on that list, common sense is not something that was taught to him. Or respect for where he is.It wasn't directed at anyone in particular,
is it possible to use other software like mt from pkane, virtins , or rew with quantasylum? or only quantasylum software?
;-)
Oh it was. He is talking about me.
I just checked and it took me two minutes to find what out it does. Both sliders work in the same way and are interchangeable. The thresholds the mode switching acts upon (sort of) an average of the two settings.When plugged on a Linux system, the E1DA Cosmos ADC shows 2 sliders in ALSAMIXER.
There is "Line" and "Line 1". Windows does not shows 2 sliders.
I have never met a documentation explaining what the second slider does.