Default Looking for music player with built in headphone calibrator

I recall having a music app long ago that had this self test to calibrate headphones so you could create profiles for all of them.
I cannot find it now! I found XenoAmp but that is not the one and even though i tried it, the graph for my calibrate headphone remained flat anyway so guess it is not working yet.

Thanks for any help!

Gayest quote ever from MST3K!
"You know Captain, every year of my life, I grow more and more convinced that the wisest and best is to fix our attention on the good and the beautiful...if you just take the time to look at it.".

My Galaxy Note Games & Apps previews YOUTUBE channel