Yes, direct multiplication, not raised.
That perfectly duplicates a sum of sines. A sin(20)cos(4) is identical to sin(16) + sin(24) with no carrier to confuse the issue. If you block the sin(24).....
thank you in advance for your effort..
Jn
No one seems to be seriously interested in devising any kind of listening test of the idea so far, what do you think?
I think it’s more about chain of events/implementation of the recording process.
I’ve heard some absolutely amazing recordings @ 16/44.1 and some absolutely horrid 24/96 recordings (vice versa)
.
Maybe identifying these recordings and doing some forensics in what the commonalities are for each could be beneficial in finding out what really matters as to audibility?
the brick wall filtering might be a factor that arises?
I’ve heard some absolutely amazing recordings @ 16/44.1 and some absolutely horrid 24/96 recordings (vice versa)
.
Maybe identifying these recordings and doing some forensics in what the commonalities are for each could be beneficial in finding out what really matters as to audibility?
the brick wall filtering might be a factor that arises?
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That’s not he case.
I listened to both the unfiltered 192Khz file and the 22.05 Khz brick wall filtered cymbal file.
And I reported that not any difference could be heard after heaving listened 32 times in a row.
Unfortunately, nobody else tried it.
The two .wav files just given can also be used for this purpose.
Hans
I'm not surprised, I don't think I could hear any difference up there, but how about transposing downwards a simple filtered blip just to see if there is any audible frequency shift? Surely the theory holds regardless of the frequencies?
I must have missed it and just tried......Idk which was which but the first file sounded a touch more up front and real compared to the ‘20’ file which sounded a touch recessed and duller.
Which was which?
With a simple blip, 6 examples are given in #51.
But there are still people thinking to be able seeing a single frequency shift in a time domain signal where in fact several frequencies are added together.
Hans
I understand all that, what I'm hoping is that if an audibility test can be devised it will settle the matter (for those that doubt it)...........
I'm surprised, the 20 file was filtered at 20Khz.
Did you play both files at 192Khz ?
You could also try this version filtered at 22.05Khz.
Dropbox - cymbal22 - Simplify your life
How does your audio system look like ?
Hans
P.S. How could you play them. Jriver tells that it does not support the format, so did you do some conversion?
So these files are not suited for a listening test because they are in 32 bit floating format.
I will try to find the original listening files.
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My main system is down, this was my shop system (yamaha RN803/ cheap 8” KLH 3-ways)
I’ll try the others as soon as my heater kicks back off!
I have no way of knowing if the sample rate is changed in my playback or not.....it’s Dropbox-airplay/Ethernet (wired) connection to the Yamaha. But both tracks were played the same.
Edit.....and if it matters or not, I went back/forth at least a dozen times and the difference didn’t really show up until 0db, but then it seemed obvious.
Ok tried the cymbal 22 set .....the difference is not as pronounced but still there, with the unfiltered version more up front/real.
I’ll try the others as soon as my heater kicks back off!
I have no way of knowing if the sample rate is changed in my playback or not.....it’s Dropbox-airplay/Ethernet (wired) connection to the Yamaha. But both tracks were played the same.
Edit.....and if it matters or not, I went back/forth at least a dozen times and the difference didn’t really show up until 0db, but then it seemed obvious.
Ok tried the cymbal 22 set .....the difference is not as pronounced but still there, with the unfiltered version more up front/real.
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Forget the P.S.
With all the experimenting, my Jriver USB driver got screwed up.
Everything working again, and no problem with playing the files.
I hear absolutely no difference between the original file, the 22.05 and the 20.0 filtered versions.
So far my listening tests.
Don’t know what to tell you, you can believe me or not.......just calling it as I hear it.
The second set of files (22) were much closer in difference than the first (20) which tells me the higher the brick wall filtering the better.
Yah Jim, I’m not used to hearing the heater down here though.......was 39 this morning!
The second set of files (22) were much closer in difference than the first (20) which tells me the higher the brick wall filtering the better.
Yah Jim, I’m not used to hearing the heater down here though.......was 39 this morning!
Thank you for trying, but the results are a bit of a mystery.
What exactly do you mean with 0dB.
Could it be that at that level some clipping occurs, leading to sound differences because below 0dB you hear no difference ?
Another reason for hearing a difference could be the tweeter not liking the HF content at higher levels and produces some IM.
As I showed in #250, nothing changed to the FR content below the brick wall.
Hans
Don't worry, I believe you, I'm happy with your results.
Just trying to understand the results.
Hans
It would be nice if others with top notch speakers could audition the recent cymbal files.
There's a long way between hearing no difference at all and hearing a substantial difference.
Hans
There's a long way between hearing no difference at all and hearing a substantial difference.
Hans