How to create custom microphone correction curves in REW

[@konstantinost3185]

You can just subtract the two responses using the Trace Arithmetics function and export the result in .txt which will be the new .cal file.

[@CyrilleBoucanogh]

Thank you. Nathan! How come REW can't calculate this for us not to use Excel? It's such a needed and simple function.

[@nathanlively]

Hey Kirill, I believe it can. There is a subtraction action in there somewhere.

[@michaelandersen9491]

Could you maybe just pull all the response curves (traces) into REW, and then divide the reference curve by each to-be-calibrated curve using "trace arithmetic" in the "All SPL" window ? The new calculated (by division) curve should be the calibration file for the to-be-calibrated file. I do a near-field (1/4 inch from cone) reading against a small fullrange driver in a box so the environmental variables matter less. Might have to screw around with smoothing based on subsequent testing.

[@nathanlively]

Hmmm, maybe? Let me know what you find out.

[@nickames4654]

What you’re seeing there, with the difference in the position of the “peaks and dips” at the HF, is mainly the result of the fact that the mics are not occupying the same exact point in space

[@nathanlively]

Thanks Nick!

[@dansantoso48]

How do u subtract a column in excell? I got VALUE error :( Thanks

[@nathanlively]

Hey Dan, at 4:24 you can see the formula in the cell. postimg.cc/yW7Kp3kJ

[@ozyprima]

awesome