Nord User Forum

I have scoured the manual and can't find a definition for the "bright" EQ setting for the acoustic piano. The description states: The BRT (Bright) mode emphasizes the high frequency range, producing a very bright and brilliant sound. But does not state the frequencies that are boosted. Thanks

I assume that is indeed "high frequencies" (a range rather a particular frequency).
The way to find out is to feed a white noise source and compute the spectrogram with and without the filter.
White noise only should have a flat spectrogram, with the filter you should see higher power in the 'higher frequencies' and work out what kind of filtering it is.
For the "piano only" I guess it will be more tricky... I guess you could play the same MIDI recording (to make sure the performance is the same) of a piece and look at the spectrogram of the whole piece with and without the filter. You can do that with Audacity. Analyze>Plot Spectrum... Let us know what you find out.