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.
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.