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Import EQ from REW to Poweramp Equalizer


ErikF
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I created an equalizer preset with REW that has the desired effect on my laptop (imported as APO preset into EasyEffects).

However, when I create the same filters (frequency, gain and Q) in Poweramp Equalizer, the filters seem to have a weaker effect.
Without knowing much about the details behind EQ, I am assuming that Poweramp Equalizer uses a different EQ mode than APO. When I select RLC (BT) as mode in EasyEffects, it sounds very similar to Poweramp Equalizer with the same filters.
So, my questions:

  1. Is there a way to load an APO preset into Poweramp Equalizer or convert the filters accordingly?
  2. Is there a way to export a preset from REW in such a way that it can be loaded into Poweramp Equalizer?
  3. What mode is Poweramp Equalizer using exactly? With this information, I could ask in the REW community if there is a way to generate filters that are compatible with Poweramp Equalizer.

Edit: These are the available EQ types in REW. Is any of those compatible with Poweramp Equalizer?
image.png.d88f758706bf6dd8b0381aca0f764cd8.png

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Poweramp can import AutoEQ preset files, so if you can massage your existing data from REW into that layout, it should be importable. Both graphic and parametric EQ modes are available. Their format is pretty simple, just text-based lists of settings.

Graphic example for some Bose headphones:

GraphicEQ: 20 -6.3; 21 -6.6; 22 -7.0; 23 -7.3; 24 -7.7; 26 -8.3; 27 -8.6; 29 -9.2; 30 -9.4; 32 -9.9; 34 -10.4; 36 -10.8; 38 -11.2; 40 -11.6; 43 -12.1; 45 -12.5; 48 -13.0; 50 -13.2; 53 -13.6; 56 -13.9; 59 -14.2; 63 -14.6; 66 -14.8; 70 -15.1; 74 -15.2; 78 -15.3; 83 -15.3; 87 -15.1; 92 -15.0; 97 -14.9; 103 -14.8; 109 -14.9; 115 -15.0; 121 -14.6; 128 -14.0; 136 -13.7; 143 -14.2; 151 -15.3; 160 -14.7; 169 -13.1; 178 -13.2; 188 -13.8; 199 -13.8; 210 -13.5; 222 -12.7; 235 -11.9; 248 -11.4; 262 -10.7; 277 -9.9; 292 -9.1; 309 -8.3; 326 -7.8; 345 -7.3; 364 -7.0; 385 -6.9; 406 -6.8; 429 -6.7; 453 -6.8; 479 -6.9; 506 -7.0; 534 -7.2; 565 -7.5; 596 -7.8; 630 -8.0; 665 -8.4; 703 -8.8; 743 -9.2; 784 -9.7; 829 -10.0; 875 -10.1; 924 -10.0; 977 -9.5; 1032 -9.0; 1090 -8.3; 1151 -7.3; 1216 -6.1; 1284 -5.0; 1357 -3.7; 1433 -2.5; 1514 -2.1; 1599 -1.5; 1689 -1.1; 1784 -0.9; 1885 -0.7; 1991 -0.3; 2103 -0.3; 2221 -0.3; 2347 -0.3; 2479 -0.6; 2618 -1.0; 2766 -1.7; 2921 -2.6; 3086 -3.3; 3260 -3.8; 3443 -3.9; 3637 -3.6; 3842 -3.3; 4058 -2.9; 4287 -2.0; 4528 -1.3; 4783 -0.5; 5052 -1.3; 5337 -2.7; 5637 -4.5; 5955 -7.1; 6290 -7.1; 6644 -4.3; 7018 -1.2; 7414 -0.2; 7831 -0.3; 8272 -0.3; 8738 -0.3; 9230 -0.3; 9749 -0.3; 10298 -0.3; 10878 -0.3; 11490 -0.3; 12137 -0.3; 12821 -0.3; 13543 -0.3; 14305 -0.3; 15110 -0.3; 15961 -0.2; 16860 -0.5; 17809 -1.4; 18812 -2.5; 19871 -3.7

Parametric example:

Preamp: -8.3 dB
Filter 1: ON LS Fc 105 Hz Gain 11.0 dB Q 0.70
Filter 2: ON PK Fc 59 Hz Gain -18.1 dB Q 0.30
Filter 3: ON PK Fc 8759 Hz Gain 5.7 dB Q 2.54
Filter 4: ON PK Fc 1056 Hz Gain 9.4 dB Q 0.32
Filter 5: ON PK Fc 892 Hz Gain -12.1 dB Q 1.20
Filter 6: ON HS Fc 10000 Hz Gain 5.3 dB Q 0.70
Filter 7: ON PK Fc 6091 Hz Gain -4.9 dB Q 6.00
Filter 8: ON PK Fc 4843 Hz Gain 3.3 dB Q 5.37
Filter 9: ON PK Fc 3304 Hz Gain -2.6 dB Q 3.33
Filter 10: ON PK Fc 2267 Hz Gain 1.4 dB Q 2.17

Andre

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Thanks for the quick reply!
The exported files by REW look very similar:
 

Filter Settings file

Room EQ V5.20.13
Dated: Nov 5, 2022 6:26:11 PM

Notes:

Equaliser: Generic
Sofa1_L Nov 5
Filter  1: ON  PK       Fc   35.45 Hz  Gain  -9.90 dB  Q  7.163
Filter  2: ON  PK       Fc   76.10 Hz  Gain  -3.40 dB  Q 16.951
Filter  3: ON  PK       Fc   98.50 Hz  Gain  -9.20 dB  Q  9.410
Filter  4: ON  PK       Fc   138.0 Hz  Gain  -4.90 dB  Q 15.232
Filter  5: ON  None   
Filter  6: ON  None   

I had to add the “Preamp:” line and remove the headers to get Poweramp EQ to import it.

However, the filters still seem to have a weaker effect than on my laptop.
Well, since “weaker effect” could be some kind of placebo effect, I connected my phone's output to my sound card's input and did some REW measurements with and without Poweramp EQ running. Then, I repeated the same with my laptop's output, where I applied the same EQ preset with EasyEffects (Linux), and my FiiO E10K, connected to my PC, which was running EqualizerAPO to apply the same EQ preset.

EQs2.thumb.png.7465ccc1cb15600356ee0b4f460f5677.png

The brown graph is actually three overlapping graphs showing the output of the three devices without EQ running.
The purple and blue graphs that are nearly overlapping are EqualizerAPO (purple) and EasyEffects in IIR mode (blue).
The red one is Poweramp Equalizer.
The yellow is EasyEffects again, but in FIR mode. The green is EasyEffects in FFT mode.

Why does the first filter (which is also shown as -9.9 dB in Poweramp EQ) barely have a -1 dB dip instead of the desired -9.9 dB?
And how could I achieve the same effect as with EqualizerAPO (purple graph) with Poweramp Equalizer?

Looking at the tiny graphs shown in Poweramp EQ, it seems more like this is a bug, and Poweramp EQ is actually supposed to give the same results as EqualizerAPO, right?

My phone is a OnePlus Nord 2 if that's relevant.

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Could you clarify whether you are talking about the EQ controls within the Poweramp music player app, or are your tests referring to the stand-alone Equaliser app? Or same in both?

It certainly looks to me as though the 35Hz filter is not being applied, but we'd need to wait for @maxmp to comment for a more detailed response.

Andre

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I am referring only to the standalone equalizer app, but I can download Poweramp and repeat the measurements there if that's helpful for you guys.

It seems like there is a filter applied at 35Hz, but the gain is more like -1dB.

I am also curious why the red graph has these higher frequency oscillations around 100Hz.

Note that this is in cascade mode, but envelope mode looks identical at 35Hz and very similar at the higher frequencies.

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It would be interesting to see the same results from the main app too, as I believe the internal EQ processing is somewhat different as the stand-alone EQ app passes more processing control through Android's sub-systems - whereas in the main music player it is all internal in PA's own code. But that is definitely Max's territory, as my expertise is more around operational advice rather than the internal workings of the audio engine.

Andre

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