• Registered: 2022-05-17
  • Posts: 12

Topic: Conversion of Equalizer Lists

That's a little hard to describe.

The available filter sets to equalize headphones contain often a huge number of bands. Take Oratory1990, most entries consist of 10 bands of a parametric EQ

https://abload.de/img/eqhd600rcjjp.png

This is from the Sennheiser HD600, like all examples in this post.

AutoEQ has a set for parametric and fixed band EQ. Additonally for graphic EQ with much more entries.

GraphicEQ: 20 -0.2; 21 -0.2; 22 -0.2; 23 -0.2; 24 -0.2; 26 -0.2; 27 -0.2; 29 -0.4; 30 -0.6; 32 -1.0; 34 -1.4; 36 -1.7; 38 -2.0; 40 -2.3; 43 -2.8; 45 -3.0; 48 -3.3; 50 -3.4; 53 -3.5; 56 -3.6; 59 -3.8; 63 -4.0; 66 -4.3; 70 -4.8; 74 -5.1; 78 -5.3; 83 -5.5; 87 -5.7; 92 -6.0; 97 -6.3; 103 -6.5; 109 -6.7; 115 -6.9; 121 -7.1; 128 -7.2; 136 -7.3; 143 -7.4; 151 -7.5; 160 -7.6; 169 -7.6; 178 -7.7; 188 -7.7; 199 -7.8; 210 -7.8; 222 -7.8; 235 -7.6; 248 -7.5; 262 -7.3; 277 -7.1; 292 -6.9; 309 -6.7; 326 -6.5; 345 -6.4; 364 -6.2; 385 -6.1; 406 -5.9; 429 -5.8; 453 -5.8; 479 -5.7; 506 -5.6; 534 -5.6; 565 -5.5; 596 -5.5; 630 -5.5; 665 -5.4; 703 -5.4; 743 -5.4; 784 -5.2; 829 -5.1; 875 -5.4; 924 -5.8; 977 -6.1; 1032 -6.3; 1090 -6.4; 1151 -6.5; 1216 -6.7; 1284 -6.8; 1357 -6.7; 1433 -6.6; 1514 -6.4; 1599 -6.2; 1689 -6.0; 1784 -6.2; 1885 -6.3; 1991 -6.1; 2103 -5.9; 2221 -5.9; 2347 -6.0; 2479 -6.5; 2618 -7.0; 2766 -7.5; 2921 -7.9; 3086 -8.2; 3260 -8.3; 3443 -7.9; 3637 -6.9; 3842 -5.5; 4058 -3.9; 4287 -3.2; 4528 -4.1; 4783 -5.4; 5052 -6.0; 5337 -6.4; 5637 -7.8; 5955 -8.2; 6290 -6.9; 6644 -5.4; 7018 -4.3; 7414 -4.4; 7831 -4.8; 8272 -4.8; 8738 -4.5; 9230 -4.5; 9749 -4.7; 10298 -5.1; 10878 -5.6; 11490 -6.2; 12137 -6.9; 12821 -7.7; 13543 -8.7; 14305 -9.7; 15110 -10.8; 15961 -12.1; 16860 -13.4; 17809 -14.9; 18812 -16.5; 19871 -18.2

That may be a bit over-engineered.

But is there a tool to compute such lists to make them usable for the abilities of the RME ADI2?

  • Registered: 2021-07-06
  • Posts: 5

Re: Conversion of Equalizer Lists

Oratory1990 has already posted sets of values specifically for the ADI2. I seem to recall that there's a link to them from the same page as the 10-band EQs.

3 Reply by KaiS (edited by KaiS 2022-06-10 14:35:41)

  • KaiS
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  • From: Germany
  • Registered: 2020-02-05
  • Posts: 3,525

Re: Conversion of Equalizer Lists

There’s no other way than entering the values manually.


As ADI-2 is limited to 7 EQ bands, 2 of which only work as shelving only, you should de-select the 3 bands with the least effect:
Bands with low gain and/or high Q-factor figures contribute less to the result and can be skipped.

In your example I would leave out:
Band 5, 6 and 9.


Anyway I would not take the presets too slavishly.
It’s measured on the estimated average of the human pinnae, not on your personal one.
The used target curve for measurement is much more course than the resulting EQ curve, so this does not make perfect sense too.
Practically, quite often the result is worse than the un-EQed original, especially in the upper frequency range, above ca. 2 kHz.

Take it as a starting point for your own private settings.


Here’s the list of presets for the ADI-2:
https://www.reddit.com/r/oratory1990/wi … _rme_adi-2

Here’s the specific entry for the Sennheiser HD 600:
https://www.dropbox.com/s/9c4p8k5n222mw … 9.pdf?dl=0

Here’s a link to the most comprehensive Auto-EQ project I know, using measurements from different sources:
https://github.com/jaakkopasanen/AutoEq … er/results

KaiS's Website

  • From: Norway
  • Registered: 2021-06-21
  • Posts: 445

Re: Conversion of Equalizer Lists

At the site it says first five bands can be used independently. Set preamp to -x.x. I used those settings and tuned from there for my HD650. Like Kais implied these numbers can only be aproximates. I got that lush/plush bass of 650 tightend up.

ADI-2 DAC, ADI-2 PRO, DigifaceUSB, UCXII, ARC, HEGEL.h80, KEF.ls50, HD650, ie400pro _,.\''/.,_
  • Registered: 2022-05-17
  • Posts: 12

Re: Conversion of Equalizer Lists

It's not for me. I have to do my EQ on my own. A bit like David Griesinger, it may look a bit less awkward when I do that. I don't achieve front localisation, but match quite well the timbre of my Geithains. My speakers are calibrated.

How to equalize headphones for accurate timbre and frontal localization without head tracking
(We don't have a media extension for punBB installed to play YT videos, have we?)

The filter lists I've tried where all sounding artificial with way too much treble energy. Seems my ears aren't that close to the GEARS equipment.

But for other people such a conversion may be helpful, because I know a lot of people with difficulties to identify the differences of two sweeps or sine frequencies in pitch or volume.

6 Reply by Happy_amateur (edited by Happy_amateur 2022-06-11 20:26:26)

  • From: Norway
  • Registered: 2021-06-21
  • Posts: 445

Re: Conversion of Equalizer Lists

Very cool video, but IMHO kinda too much for my listening needs. I think the 1+5+1 PEQ in ADI-2 PRO is more than enough for me to tune headphones or speakers. Of course it would be cool to have ten band, but you know you need enough DSP and screen estate for that. Then again you can do decent correction from the 3 band PEQ in TMfx

AutoEQ is really cool. I just dial in numerically in the I/O section. Fine tune from graphic PEQ. Name and save, Voilà!

ADI-2 DAC, ADI-2 PRO, DigifaceUSB, UCXII, ARC, HEGEL.h80, KEF.ls50, HD650, ie400pro _,.\''/.,_
  • From: Norway
  • Registered: 2021-06-21
  • Posts: 445

Re: Conversion of Equalizer Lists

To your question I dont think you have to have a phd in computer science to make a curve from your numbers list. Maybe MS excel could do that. With your HD600 example I would just take note of the frequenzies that mark if level is going up or down ie where the curve changes direction, sharp or gradual changes would indicate some Q level. Ive never heard of a graphic to PEQ translator.

ADI-2 DAC, ADI-2 PRO, DigifaceUSB, UCXII, ARC, HEGEL.h80, KEF.ls50, HD650, ie400pro _,.\''/.,_

8 Reply by MC

  • MC
  • MC
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Re: Conversion of Equalizer Lists

https://youtu.be/_Nq9ZGAYTwU

Regards
Matthias Carstens
RME

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