How to adjust individual key volume on Key 61?

My A4 key is much louder that all other keys on my Key 61 when playing various piano sounds. I've spent a lot of time messing with the keyboard velocity response settings as well as compressors, yet it still stands out with a higher volume. The answer would be to have an individual key volume adjustment. Is there such a thing for this keyboard? Thanks in advance.

So two different thoughts...

1) It may be the program you are using. Try different programs and see if you get this same wild velocity level change. Sometimes you just hit the "just right" resonant harmonic and it can bump the program/filters/mixer/speakers... so I'd try a different program and just see if it makes a difference
2) There may actually be something abnormal with the sensor... I'd also record midi to a track and try to do your best to play light/medium/hard, and see if you have anything wildly abnormal for a velocity level with that (or other) keys...

Beyond that... it'd be hard to check... but those two things immediately come to mind.

NearTao, I've tried many different piano programs in Fabric XL and Stage Piano. A4 acts the same, very loud.

Sounds like it's time to return/exchange it then