There is a CSV file provided for each headphone. This contains the raw numbers for all 600+ measurements with frequency in one column and the measurement for that frequency in the next column. So:
- download the CSVs for two headphones – I’ll call the one you own A and the one you want to emulate, B
- import them into your spreadsheet program
- copy the raw column from headphone B as a new column in the spreadsheet table for headphone A (or vice versa)
- create a new column with the formula to subtract the value for headphone A’s measurement from headphone B’s measurement at the relevant frequency in each cell in the new column.
That gives you the EQ curve you want to match in your equalizer software. I do my listening on a MacBook, so I’m limited to using a 31-band (1/3 octave) GEQ. But it’s not a big limitation, since the results are quite good. On a Win box I could use Peace GUI’s preset for 31-band input. But I prefer to use the graphical interface in Peace for this. Either way, I manually input the 31 dB values for each of the 31 frequencies (20 Hz, 25 Hz, 31.5 Hz, etc.). Set the pre-amp value to something sensible.
I assume one could go to the next level and automate in the spreadsheet to generate a text file suitable for EQ-APO or Peace input. In that case you could have the spreadsheet spit out a file containing all 600+ frequency values. I believe EQ-APO would ingest this quite happily. I guess one would use the default 1.41 Q value for each band?
If the above isn’t clear or sounds too complicated, let me know. These things are easier done than said in most cases.