Insult? What insult? Since when is invoking the well known Volterra series method of analyzing non linear systems an insult?
Again I was not clear, I don't care much about your measurements.
I respect your approach but mine is a little different.
If you want you can do it for the audio community, but not specifically for me.
Have you ever listened to the Pass F1?
If you have listened to it and did not like it, please direct your thoughts to Nelson Pass.
But if you've never heard it, please avoid judging what you don't know.
And again you have not understood the topic between me and Demian.
Well, I don't own the Pass F1 so I cannot measure its IMD, is this clear?
So what are you talking about if the Pass F1 IMD is unknown?
If you are so interested to know the IMD of the Pass F1 measure it by yourself and then claim the result, otherwise please stop speculating about something you don't know.
Which contemporary DAC do you know of that has high enough of jitter to cause audible difference in level matched double blind listening test?
That's your claim which you are free to post. Are you aware that two solid state amps with measurable differences didn't make audible difference to people in level matched double blind listening test? In other words, contemporary measuring devices are far more sensitive than our hearing.
Thanks Mark for correcting my error. So the AK4499 eval board uses exactly the solution of AK44997 eval board with 470 uF.
In the datasheet, AKM suggest 1-ohm resistors between VREFH & analog 5V, do they really use 10-ohm resistor in eval board?
I know IMD is related to HD in that they are caused by the same mechanisms. Nelson calls it the elephant on the dance floor because it is more of an issue than HD. I asked about IMD in general terms, I didn't specify any amp, because you mentioned only HD as if that's all that matters. You now know IMD is more audible than HD, you should be happy 🙂
They use two of them, effectively in series for time constant purposes. If you want to see the schematic for that, please PM.
Aren't you supposed to include the specs of those components when making such request?
No, you don't understand, for me the THD does not matter and neither does the IMD.
First of all I rely on listening.
Then why are you measuring oscillators phase noise down to -150dB @10Hz, has your hearing told you there's something interesting there?
Exactly, firstly I made the listening comparison between the same DAC with the Crystek and the emitter coupled oscillator some years ago.
I discovered that with the EC oscillator it did sound much better.
At that time I did not own the Timepod so I knew nothing about the phase noise of the EC oscillator, I only knew the phase noise of the Crystek oscillator from the datasheet.
Later I got the Timepod and I measured the phase noise of the EC oscillator, that was 30 dB better than the Crystek.
And the difference was in the close in phase noise since the noise floor of the Crystek was better than the EC oscillator.
Then I drew my conclusions: I have to improve the close in phase noise to get the DAC sound better.
That's the reason we have developed the Driscoll oscillator performing state of the art close in phase noise.
As soon as possible we will make a listening comparison between the EC and the SOTA Driscoll oscillators to understand if 25dB of phase noise improvement has effect on the digital to analog conversion.
Unfortunately contemporary measurement devices fail to explain what we are hearing.
But it's my fault.
I should have avoided talking about vacuum tubes and zero feedback loop in a thread where people are obsessed with the number of zeros after the decimal point.