Yes I chose those numbers, but not to add them. You are talking about something else entirely.
Jn
Nice work, thank you.
Now what do all three look like in the time domain.
Also, perhaps you have an alternative explanation to explain why Han's output was 17.5 kHz. If so, tell us. Thanks for your work. (oh, and don't worry about the actual sum math on my 17.5k/22.5k being 2 sin (20k)cos(2.5k)), your frequencies work just as well.
Jn
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So, you had managed to hide your contemptuous and hostile nature and your superiority complex from your employers for 40 years?
Congratulations.
I told myself, in the same time, that, when I was still active, I had no time to go on forums in order to treat others as idiots.
It was the flaws on how you set up your test equipment that I and another member pointed out repeatedly and yet you repeatedly forge ahead with your findings from your flawed test to form your argument. And you say something about ignorance, eh. 🙄
Worked for me, results ($$$) always smooth things over. I often had open contempt for managers that had absolutely no clue as to what was going on on a technical level (wink,wink,nudge,nudge).
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Originally Posted by cbdb
So if I play a 175 hz sine and 225 hz sine it will sound like one 200hz sine.
Nope. Nothing's there. (175Hz and 225Hz mixed).
Attachments
I know, but beggars can't be choosers. At least he did something using two files. The possible tests he can do are endless.
Jn
Much easier than hiding being programatically and proudly clueless (and the usually associated contempt for knowledge).
Be specific. there were comments which are wrong and others misunderstood.
It is, BTW, to help you tell how accurate your repo system is. Starting with a well known voice recording compared to the actual in room spoken voice of that well known persons voice. ... I thought I addressed the major concerns in record/play technique and setup. How well you do the process, as i described, will give you areas to improve. Then use a cymbal etc. If they sound the same or as close as you care to get, then try CD vs 24/96+ and compare to live voice or instrument sound.
Use close mic, omni, flat on axis and listen also in near field. Both will minimise room influences. You can also use headphone for repo. if you dont think your ear will be able to discriminate well enough to tell your level of repo accuracy. You can EQ the headphone flat.
That should be more than enough hand holding for you to take it and do it well with your own added expertise.
THx-RNMarsh
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Again, just because something looks like what might be loosely referred to as a 20kHz waveform does not mean that there is strictly a frequency there. Likewise, seeing a spiritual figure in grilled cheese sandwich does not mean there is an actual figure of any type there. Both it and your 20kHz signal are products of human visual perception.
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Nice. From Nyquist denier, to Fourier denier, quite an evolution in two weeks.
Hint: the Fourier transform is a bijective transformation between two function spaces L(R^p,q), easy to prove the injectiveness and surjectiveness of the direct and reverse Fourier transforms. Therefore, for each signal there is a unique spectrum, and the other way around. No exceptions, even for time/bandwidth limitations.
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The use of continuous sines and large windows guarantees the results he is showing.
That will not be what happens with short bursts. Just go back and look at my PSP analysis. Han's started with 20khz, ended up with 17.5 kHz.
Throwing up simulations which are entirely different is strawmanish.
Jn
Possibly due to using a phone (away for work), but I see you refer to Hans' work, but I can't find it... About Time a link was posted perhaps? 🙂
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