You Need Loudness Correction

[wadude]

The main reason I listen through speakers is that the sound changes based on many variables, not just loud and soft. It seems closer to the real thing.

 

[dasdoing]

There's not much loss with lower volume in the higher frequency part of the contours, so perhaps one only needs to use their bass control?

we actually have to look at the difference:

 

[Daverz]

we actually have to look at the difference:

View attachment 461619

Thanks. Where is that from? I'm not finding it enlightening.

 

[Hayabusa]

Thanks. Where is that from? I'm not finding it enlightening.

Indeed, not very clear what deltas, they are also off it seems.

These are the deltas measured from Audyssey wrt to the 85dB reference level for different volume offsets:

 

[Daverz]

Indeed, not very clear what deltas, they are also off it seems.

These are the deltas measured from Audyssey wrt to the 85dB reference level for different volume offsets:

View attachment 461648

Thanks, that's more helpful. Camilladsp has a loudness filter with a magnitude response that looks like this example:

But it does allow you to set separate low and high boosts, they do not have to be the same:

filters:
  loudness:
    type: Loudness
    parameters:
      fader: Main (*)
      reference_level: -5.0
      high_boost: 10.0 (*)
      low_boost: 4.0 (*)
      attenuate_mid: false (*)

More here: https://github.com/HEnquist/camilladsp?tab=readme-ov-file#loudness

Camilladsp also has a compressor, but that has a lot of parameters to adjust.

GitHub - HEnquist/camilladsp: A flexible cross-platform IIR and FIR engine for crossovers, room correction etc.

A flexible cross-platform IIR and FIR engine for crossovers, room correction etc. - HEnquist/camilladsp

github.com

 

[Hayabusa]

Thanks, that's more helpful. Camilladsp has a loudness filter with a magnitude response that looks like this example:

But it does allow you to set separate low and high boosts, they do not have to be the same:

filters:
  loudness:
    type: Loudness
    parameters:
      fader: Main (*)
      reference_level: -5.0
      high_boost: 10.0 (*)
      low_boost: 4.0 (*)
      attenuate_mid: false (*)

More here: https://github.com/HEnquist/camilladsp?tab=readme-ov-file#loudness

Camilladsp also has a compressor, but that has a lot of parameters to adjust.

GitHub - HEnquist/camilladsp: A flexible cross-platform IIR and FIR engine for crossovers, room correction etc.

A flexible cross-platform IIR and FIR engine for crossovers, room correction etc. - HEnquist/camilladsp

github.com

This example makes quite big corrections not really inline with equal loudness deltas I would say....
Room for improvement there.
The nice thing about Audyssey's Dynamic EQ is is has NO compressor, its purely only changes by the volume setting and as far as I can see a reasonable approximation of equal loudness curve deltas.

 

[dasdoing]

we actually have to look at the difference:

View attachment 461619

ok guys, to clarify. These are the compensation curves, so inverted deltas.
They are from: https://github.com/dpapavas/alsaloudness,
which also has a very good explanation of the concept.

 

[dasdoing]

I once created an audio-file in another topic that shows the effect. it's not on my Google Drive anymore, but if there is interest I can create it again