Sparkos SS3602 Opamp Rolling In Fosi P4

[KSTR]

Here you can download 3 samples and do a comparison

Complete bullshit what is offered there.
There are more than 2dB level difference between 1.wav and 3.wav (3.wav is louder, and even clipping sometimes).

The level difference is never ever the result of the opamp change, rather it happened either because he's completely clue-less, or worse, intentionally in order to trick people.

 

[Flageborg]

...he's completely clue-less, or worse, intentionally in order to trick people...
...The level difference is never ever the result of the opamp change...

Who is "he"?
You did not notice who did the recordings?
You mention difference in level, but which part of the frequency range has more than 2dB difference?
How is your understanding of differences in the sound clips done by VirtualHiFi?

 

[solderdude]

These files have been extensively scrutunized and are clearly 'doctored' to make them sound distinguishable but only because of level difference and clipping of 1 file.

read onwards from here:

Serious Question: How can Op Amp rolling improve the sound of an already well measuring device? Are that many confused? (Master Thread)

That would be hard to tell without measuring equipment, they copies could work just fine or they could be worse . Who knows ? Most copying is done to skirt licensing money and lowering other costs how bad is the copy ? And there is also licensed clones that should be as good as original ? Many...

www.audiosciencereview.com

Serious Question: How can Op Amp rolling improve the sound of an already well measuring device? Are that many confused? (Master Thread)

The obvious suspicion is really sloppy test setup, making it worthless. The worse suspicion is deliberate manipulation to fabricate perceivable differences. ¿por qué no los dos?

www.audiosciencereview.com

 

[Old_School_Brad]

Who is "he"?
You did not notice who did the recordings?
You mention difference in level, but which part of the frequency range has more than 2dB difference?
How is your understanding of differences in the sound clips done by VirtualHiFi?

I had copied this comment before it suddenly disappeared, but I later confirmed that the information is accurate.
The files have been thoroughly investigated when the video was uploaded. They differ significantly.

And here is more information:

Does Op-amp Rolling Work?

Please don't give clicks to that shill Censorship seldom leads to anything good. Have you listened to the files he posted, or is this an example of "contempt before examination?"

www.audiosciencereview.com

 

[pkane]

You mention difference in level, but which part of the frequency range has more than 2dB difference?

Take your pick. There's about 2.3dB level difference, but with many excursions well above that (1 vs. 3):

A little better with 1 vs. 2 (about 1dB difference with fewer excursions):

 

[Flageborg]

These files have been extensively scrutunized and are clearly 'doctored' to make them sound distinguishable but only because of level difference and clipping of 1 file.

Ok, but who did change the recordings to trick "people"?
Was it done just to make people buy more expensive opamps?

 

[Flageborg]

I had copied this comment before it suddenly disappeared, but I later confirmed that the information is accurate.
The files have been thoroughly investigated when the video was uploaded. They differ significantly.

View attachment 445708

And here is more information:

Does Op-amp Rolling Work?

Please don't give clicks to that shill Censorship seldom leads to anything good. Have you listened to the files he posted, or is this an example of "contempt before examination?"

www.audiosciencereview.com

Ok, but what others found to be differences is not possible due to changing opamps?
Because all opamps operate 100% identical at any electrical levels?

 

[Flageborg]

Take your pick. There's about 2.3dB level difference, but with many excursions well above that (1 vs. 3):
View attachment 445715

A little better with 1 vs. 2 (about 1dB difference with fewer excursions):
View attachment 445717

Ok, but it is likely that the producer of the soundfiles did changes to the frequency response around 60Hz, 90Hz, 180Hz, 360Hz and so on with variable gain in each area?

 

[pkane]

Ok, but who did change the recordings to trick "people"?
Was it done just to make people buy more expensive opamps?

These are obviously badly done recordings, whether intentionally or not. I can't judge someone's intent from a set of files. DeltaWave is unable to compute intent from the waveforms, I'm afraid

 

[pkane]

Ok, but it is likely that the producer of the soundfiles did changes to the frequency response around 60Hz, 90Hz, 180Hz, 360Hz and so on with variable gain in each area?

I don't know what you're asking. There were major issues with how the recordings were done. Since they were posted to prove a point about audible opamp differences, "Hell Yeah Rolling Opamps Makes Your Amps Sound Better! (Hear It For Yourself!)", the only point they actually managed to prove is that they don't know what they are doing or are intentionally misleading. From previous history with Danny, I suspect both (but can't prove this).

See the horizontal lines going through the spectrum and through the whole recording? These are not part of any music or any recording that is reproduced/recorded correctly. These are distortions lines that should not be there. Most likely the opamp(s) were not stable in the circuit, which is one of the reasons one should not randomly swap opamps without understanding what they are doing:

 

[Flageborg]

I don't know what you're asking.

Your frequency chart show different levels in different areas. Why is the difference in level(+2dB) not consistent trough all of the frequencies?

 

[Flageborg]

See the horizontal lines going through the spectrum and through the whole recording? These are not part of any music or any recording that is reproduced/recorded correctly. These are distortions lines that should not be there.

View attachment 445727

This is the music which is presented in those 3 files.
This is the music found on Youtube

This is a Spectrum of the music from Youtube. Is it different from your Delta Spectrogram?

 

[MAB]

Your frequency chart show different levels in different areas. Why is the difference not consistent trough all of the frequencies?

None of us know.
We just know there are large differences that are in no way able to be caused by the opamp changes.
Nor the absolute gain differences.
It's a mess.
Not able to assign intent.

What are trying to do?

 

[Flageborg]

None of us know.
We just know there are large differences that are in no way able to be caused by the opamp changes.
Nor the absolute gain differences.
It's a mess.
Not able to assign intent.

What are trying to do?

Ok.
I got my Fosi X5 a few weeks ago after reading the review about it at ASR.
Product sound very good in my system and Fosi have more products available.
Many Youtubers are talking very positive about Fosi Products at a low price.
Several Youtubers talk very positive about changing opamps, but the price
is about same level as the product itself. Actually very expensive.
Is there any difference in sound? Yes....is stated by several Youtubers.
No is stated by measurements. I can hear differences in sound samples.
That is why I am searching some answers to make a decision.......

 

[Flageborg]

None of us know.
We just know there are large differences that are in no way able to be caused by the opamp changes.
Nor the absolute gain differences.
It's a mess.
Not able to assign intent.

What are trying to do?

As far as I know, based on the GR-Research video, the recordings were done at New Record Day.
New Record Day has been a Youtuber for many years and is still going strong.
Can I trust this Youtuber and the information he is providing?
Like many Youtubers it is always possible to find things to like and things to hate without being
at a professional technical level. But I am curious in the same way as with "Sound of Cables"

 

[pkane]

This is the music which is presented in those 3 files.
This is the music found on Youtube

This is a Spectrum of the music from Youtube. Is it different from your Delta Spectrogram?


View attachment 445735

Delta spectrogram is the difference in spectrum between two recordings, not the spectrum of musical content.

 

[Flageborg]

These files have been extensively scrutunized and are clearly 'doctored' to make them sound distinguishable but only because of level difference and clipping of 1 file.

Ok.
A lot of information about these files are posted by experienced people.
Differences has been discovered.
Why would anyone manipulate a file and include clipping as part
of the manipulation when so many people have tools to discover
every bit in a file?


Are differences due to
1) manipulated files
2) opamp differences

Clipping has been detected.
What can cause clipping?

The product in which the opamps were tested has a variable gain button.

If the variable gain button is lowered 3dB it will be no clipping
in the file with clipping which is presented in the video?

How about asking New Record Day to make new files with reduced gain?

 

[Flageborg]

Delta spectrogram is the difference in spectrum between two recordings, not the spectrum of musical content.

Ok. Thanks for information

 

[Old_School_Brad]

How about asking New Record Day to make new files with reduced gain?

Many comments on YouTube highlighting the clearly flawed sound clips have been removed or hidden since the video was posted. It does raise the question -why?

 

[solderdude]

Ok.
A lot of information about these files are posted by experienced people.
Differences has been discovered.
Why would anyone manipulate a file and include clipping as part
of the manipulation when so many people have tools to discover
every bit in a file?

He NEEDS to make files that are audible different.
That's his shtick.

Are differences due to
1) manipulated files

Yes, obviously as the differences are more than 'barely audible'.

2) opamp differences

No... they can't be. The output signal is exactly the same when the opamps would be the ONLY difference (and not manipulated)

Clipping has been detected.
What can cause clipping?

manipulation of the files. This could be intentional (which is expected) or something stupid like some auto level adjust during the 'recording process'.

The product in which the opamps were tested has a variable gain button.

WHY would one alter the gain (or volume control) when comparing op-amps.
Opamps don't alter the volume... they can't. The gain is determined by components around the op-amps.

If the variable gain button is lowered 3dB it will be no clipping
in the file with clipping which is presented in the video?

It is unknown how and why the files were manipulated.

How about asking New Record Day to make new files with reduced gain?

How about you ask him/them and do it properly... Oh right ... nobody would hear any difference between the files while Danny claims very audible differences. It would be silly if no-one could detect any differences.
I hope you are aware other people also made comparisons which are not manipulated. See if you can tell which is which.