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peculiar behaviour! Pos Flaw

Posted: Sat Jan 13, 2018 8:49 pm
by kentajalli
I have an LG G6+ phone now, and thanx to this forum's instructions, I can now appreciate the full potential of the device's DAC.
I have discovered a very peculiar behaviour from Neutron, I'll try to explain it as simply as I can.
I have down converted DSD/SACD material to 24bit/88.2kHz on my PC and loaded the material onto the phone.
On "Audio Hardware" enabling the "Ultrasonic filter" and setting it at 20kHz (default is a silly 11kHz or so!) causes a sharp high treble roll-off - very audible !
Now I am 57 years old, and it beggars belief that my hearing be so good - so I investigated further - only after 40kHz the audible effect becomes zero!
Is there a flaw in neutron?
Does material encoded in 88.2kHz cause the filters to register half as much ?
Is it the same story on Equaliser bands too?

I think Spectrum analyser's weighting is not sufficient - the bass region is peaking into red all the time, while highest treble region does not even register.

Re: peculiar behaviour! Pos Flaw

Posted: Sat Dec 01, 2018 2:39 pm
by fastersound
kentajalli wrote:I think Spectrum analyser's weighting is not sufficient - the bass region is peaking into red all the time, while highest treble region does not even register.
I have this exact same issue with the spectrum analyzer. I'm also on an LG, but the V30+.

Did you ever figure this out, or does someone know a fix for this?

Many thanks.

Scale of Spectrum Analyzer

Posted: Thu Dec 12, 2019 6:44 pm
by blaubär
fastersound wrote:
Sat Dec 01, 2018 2:39 pm
kentajalli wrote:I think Spectrum analyser's weighting is not sufficient - the bass region is peaking into red all the time, while highest treble region does not even register.
I have this exact same issue with the spectrum analyzer. I'm also on an LG, but the V30+.

Did you ever figure this out, or does someone know a fix for this?
I just noticed that, too. But I think this is just an effect of scaling. When you switch from the default logarithmic to linear, then the width of the lower octaves shrink, so the height has to grow so that the area = width * height stay the sames. Now if one would scale everything down so that the height stays the same in the lowest octave then we wouldn't see anything in the highest octave (which is the full right half of the screen in the linear spectrum) at all. Ahem ... clear what I mean ?

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Re: peculiar behaviour! Pos Flaw

Posted: Sat Jul 11, 2020 4:04 pm
by blaubär
fastersound wrote:
Sat Dec 01, 2018 2:39 pm
kentajalli wrote:I think Spectrum analyser's weighting is not sufficient - the bass region is peaking into red all the time, while highest treble region does not even register.
I have this exact same issue with the spectrum analyzer. I'm also on an LG, but the V30+.

Did you ever figure this out, or does someone know a fix for this?

Many thanks.
Try the new version, there are additional options :
dmitrykos wrote:
Fri Feb 14, 2014 7:22 pm
2.14.4:
* New option UI - Spectrum Analyzer:
- Flat: to switch on/off flattening spectrum for a pink noise;
- Scale: to scale the spectrum's response.
Improved:
[...]
- Spectrum Analyzer calibration to match real power of frequencies;