Originally Posted by Chu Gai
. Spoken like a bureaucrat looking to rationalize and sweep large discrepancies away rather than investigate the reasons. 50Hz as a justification? Better tell Agilent and Tectronix that the results they obtain depend on what country they're in.
Say what? You are not having this much difficulty reading my English are you? The difference was in the equipment under test, not the measurement equipment. I have worked and run hardware projects that shipped on both sides of the ocean. Except in rare cases, they were different boxes. And power supply change is the primary change made. The output of the Miller test shows power supply spurrs that are not in John's. No wonder you are not convinced. After explaining half a dozen times, you still not following the answer
I have a copy of the whole paper. Would you like it?
That is code for you didn't pay for it?
If so, no I can't take your copy. I am fascinated that you did not quote anything form it though
No, he said in light of Dolby's findings, his findings or suggestions were overcautious. Dunn knew there are no audio signals that were 120dB at 24kHz. Who knows what position he'd have today?
See, you really can't follow the answers given. I explained at length his statement and here you are, confusing the *jitter frequency* with source music frequency. Jitter frequency can be anything it wants. It is created by equipment design and activity. It has nothing to do with what is in your music.
I'm not asking you to do anything. I'm also not in favor of taking the lazy way out making convenient assumptions.
But you are Chu. You constantly ask the other side to go and run exercises for you. It is classic debating tactic to shut down the conversation unless and until someone produces what you are demanding. Why don't you go and find a tool that does what you want, just the way acquired that Dolby paper?
You're the guy who pulled the car story out.
Yes, but I did it like a scientist. I showed how measurements can be inaccurate due to varying samples, test day condition, the mileage on the car, the wind direction. It took a marketing person to translate a jitter variation to a precise *2* second change in 0 to 60 time. You lecture how you are about detail and accuracy and then pull a stunt like that.
Is that a position held by the manufacturer? Maybe your vaunted inside contacts can confirm that publicly.
For all but a select few which are hand tested unit by unit and tweaked, yes. The Berkeley DAC for example gets burned in for a week and then hand tuned. Ditto for my Mark Levinson DAC although they offered a non-tweaked version.
The standard line in every spec sheet is what Chu? "Specifications subject to change." So if you think anyone guarantees specifications of any audio equipment, you are in for a rude awakening.
From cars to water? From water to the president
Clearly when we explain the technology at hand, there is trouble following the answer. So I thought I use an analogy that is easier to understand. What was the result? Misdirection. Instead of say "OK, for those I see that there can be variation." But instead, you turn that into a statement about me. Are you still standing by your generalization that no matter what I measure, I am going to find identical results even if the subject under test varies?
What did they say?
Only one? You bailed rather than challenge his statements.
I didn't bail. I had left the thread before he showed up. You quoted him here and I answered it. And twice. If you have trouble following my answers, then you have no business claiming to believe what he has said.
Nice try. Where was the other half spent? Pushing the failed platform and chatting up audio on forums?
Oh I don't know.... Maybe managing development of technologies that have shipped in a few billion products? Three of them won this kind of award:
Indeed, you probably have trouble putting together a system without it using a technology coming out of my team. To answer the next question of personal involvement, there are many but you can look the list of patents for a bit of that: http://www.boliven.com/patents/searc...Majidimehr%22)
. And this little book: http://www.amazon.com/Optimizing-UNI...2647103&sr=8-1
As a marketing guy, you really don't want to ask open ended questions like this from the other guy, do you?
But no, I have been fortunate enough to have a job that mirrors what I talk about here so in that sense, I am not wasting time here.