The JPS Labs: Abyss AB-1266 Impressions Thread
Oct 27, 2020 at 8:53 PM Post #12,586 of 22,596
My goal is to reduce the brightness without touching too much of the original sound... As you said, that would affect the timbre of the instrument...
1/2 Octave Bandwidth: Q = 2.871
1/3 Octave Bandwidth: Q = 4.36
1/4 Octave Bandwidth: Q = 5.76
1/8 Octave Bandwidth: Q = 11.54


maybe I have to find the exact note that caused the brightness, then increase the Q value, thus minimize the influence.

I encourage everyone to try this https://www.szynalski.com/tone-generator/

I did an experiment listening from A5 --- C7# (880hz - 2217hz) to fine-tune. I would represent brightness/harshness using a scale from -3 to +3. I set A5(880hz) to be 0. Here are my results:

A5 880hz 0
A#5 932hz 0
B5 988hz 0
C6 1047hz +1
C#6 1109hz +1
D6 1175hz +2
D#6 1256hz +2
E6 1319hz +3
F6 1397hz +3 wow this note super intense
F#6 1480hz +3
G6 1568hz +2
A6 1760hz +2
A#6 1865hz +1
B6 1976hz -1

C7 2093hz 0
C#7 2217hz 0

The peak is found----- F6!! But everyone has different ears, so we may have different results... I would apply EQ ~1390hz Q: 3 -3db
 
Oct 28, 2020 at 11:21 AM Post #12,587 of 22,596
Oct 28, 2020 at 11:41 AM Post #12,588 of 22,596
Absolutely. I can change the sound just by moving it on my head. How you would get consistent measurements I have no idea. Especially ones that others could duplicate for comparison.
 
Oct 28, 2020 at 3:49 PM Post #12,589 of 22,596
Guys I need help please!

Here is the specification of the xi audio formula s amp: I use low gain.
  • Output: 6W @ 16 ohms
  • Input Z: 10 Kohms
  • Input Sensitivity: 1000 mV
  • Gain:Selectable 10 dB (Low) / 16 dB (High)
  • THD: 0.0006% @ 300 mW
  • Noise floor: -110 dBV
However, the chord dave I use generates 3V when using DAC mode.... which is so much higher than the 1V input sensitivity....

I guess that would cause clipping and distortion....? Thanks!
 
Oct 28, 2020 at 3:58 PM Post #12,590 of 22,596
Guys I need help please!

Here is the specification of the xi audio formula s amp: I use low gain.
  • Output: 6W @ 16 ohms
  • Input Z: 10 Kohms
  • Input Sensitivity: 1000 mV
  • Gain:Selectable 10 dB (Low) / 16 dB (High)
  • THD: 0.0006% @ 300 mW
  • Noise floor: -110 dBV
However, the chord dave I use generates 3V when using DAC mode.... which is so much higher than the 1V input sensitivity....

I guess that would cause clipping and distortion....? Thanks!

I can feed the formula s with my bartok set at 6v with no issues I usually back it down about 10db on the bartok which provides about 3v and it sounds good no distortion to my ears.

You can adjust the daves output to and use it as a pre. That is what I do with the Bartok as well it is nice to have remote volume control.
 
Oct 28, 2020 at 4:26 PM Post #12,591 of 22,596
I can feed the formula s with my bartok set at 6v with no issues I usually back it down about 10db on the bartok which provides about 3v and it sounds good no distortion to my ears.

You can adjust the daves output to and use it as a pre. That is what I do with the Bartok as well it is nice to have remote volume control.

Thanks so much!

I'll set the formula s to its maximum volume, and use dave's digital pre amp to control volume. You are right, doing this way even makes my life easier because of the remote control lol
 
Oct 28, 2020 at 6:19 PM Post #12,592 of 22,596
I would hesitate to set the Formula S, or any amp for that matter, to maximum volume. Better off setting it at 50-70% and adjusting the Dave from there. IMO
 
Oct 28, 2020 at 6:29 PM Post #12,593 of 22,596
I would hesitate to set the Formula S, or any amp for that matter, to maximum volume. Better off setting it at 50-70% and adjusting the Dave from there. IMO
Agreed. I very occasionally use the Dave as preamp to be able to control the volume with the remote. With the volume on the Formula S low, 25% or so, I got some kind of distortion or clipping. When I put it at 50% or so it works well.
 
Oct 28, 2020 at 6:54 PM Post #12,594 of 22,596
Agreed. I very occasionally use the Dave as preamp to be able to control the volume with the remote. With the volume on the Formula S low, 25% or so, I got some kind of distortion or clipping. When I put it at 50% or so it works well.

its not usually a good idea to have two volume controls in the chain. One should be maxed out and the other for attenuation.
 
Oct 28, 2020 at 9:25 PM Post #12,595 of 22,596
Yes I know, I know, I'm not here to get doctored on what I should do or not do with whatever I have.
There are some recordings that I love recorded long ago, at a local shop and the experience is one of nostalgia and not high rez bliss.
With that said I still like to listen to them with thr TC as that's all I have an can afford right now.
I even used the *crap in, crap out * example in my post regarding to the 128kbs mp3... I guess you missed it by a mile.

Don't listen to these guys. High-end equipment with mp3 will sound a lot better. Think about it with TV's. If you feed 720p movie to a 4K TV, upscaling algorithms will make it 4K and depending on the quality of the TV, it is actually quite impressive. Even my girlfriend thought she was watching a real 4K movie once while it was just upscaling doing the magic.

Same with music. Really good DAC's are able to upscale the music to a much higher quality than it really is. If your DAC does a poor job at it, there is even software to upscale your music to a much higher quality.

I'd be more concerned how the music was mixed and mastered rather than whether you listen from a 320kbps mp3 or a Flac file (some recordings are mastered differently I noticed with DSD / FLAC / mp3 versions ).
 
Oct 28, 2020 at 9:47 PM Post #12,596 of 22,596
Don't listen to these guys. High-end equipment with mp3 will sound a lot better. Think about it with TV's. If you feed 720p movie to a 4K TV, upscaling algorithms will make it 4K and depending on the quality of the TV, it is actually quite impressive. Even my girlfriend thought she was watching a real 4K movie once while it was just upscaling doing the magic.

Same with music. Really good DAC's are able to upscale the music to a much higher quality than it really is. If your DAC does a poor job at it, there is even software to upscale your music to a much higher quality.

I'd be more concerned how the music was mixed and mastered rather than whether you listen from a 320kbps mp3 or a Flac file (some recordings are mastered differently I noticed with DSD / FLAC / mp3 versions ).
I agree with some of what you are saying, but if you do a side by side comparison of a song at 320kbps upscaled and then at 16/44 (or higher) the 320 mp3 will always sound worse (I have an m-scaler too and I’ve tested this, most recently with the new Napalm Death album ).
 
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Oct 28, 2020 at 9:56 PM Post #12,598 of 22,596
I agree with some of what you are saying, but if you do a side by side comparison of a song at 320kbps upscaled and then at 16/44 (or higher) the 320 mp3 will always sound worse (I have an m-scaler too and I’ve tested this, most recently with the new Napalm Death album ).

To be honest, I have never heard significant differences when I exported my projects in .wav files or 320 kbps mp3. Or even compared it to the original project in Logic Pro.

So I am bit skeptical why the difference on platforms like Tidal is much more significant between different formats. Hence why I believe some formats are mixed and mastered differently.

And yeah, I enjoy listening to mp3 a lot more on my better equipment than from my Sony WH-1000XM3 or Apple AirPods.
 
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Oct 28, 2020 at 10:01 PM Post #12,599 of 22,596
To be honest, I have never heard significant differences when I exported my projects in .wav files or 320 kbps mp3. Or even compared it to the original project in Logic Pro.

So I am bit skeptical why the difference on platforms like Tidal is much more significant between different formats. Hence why I believe some formats are mixed and mastered differently.
I hear big differences. I don’t want to say it is dependent on your chain, but, I mean, it kinda is.

Download an album at 320 and then at 16/44. You will hear significant differences, but it may depend on your amp and dac. The Napalm Death album I mentioned is a good example. The 320 out of my Hugo 2 sounds better than out of my DAVE. (I have tested this)
 
Oct 28, 2020 at 10:03 PM Post #12,600 of 22,596
I hear big differences. I don’t want to say it dependent on your chain, but, I mean, it kinda is.

Download an album at 320 and then at 16/44. You will hear significant differences, but it may depend on your amp and dac. The Napalm Death album is a good example. The 320 out of my Hugo 2 sounds better than out of my DAVE.

As I mentioned, on Tidal I also hear big differences. But with my own music (which I produced), I did not hear such differences where the mixing and mastering was unchanged.

So that is why I believe that a lot of those "high-res" audio is mainly due to different mixing and mastering.
 

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