Note labels in the PRV Question

[Tez]

On a 76-key keyboard, which I use, the 3rd C is “Middle C”, and according to my ear and the fundamental shown in Voxengo’s Span this is middle C. The Span identifies this as C4 which is standard.  The PRV shows this note as C5. Is the PRV off by an octave?

 

[scook]

 

[Chaps]

The MIDI designation of middle c is different from the middle c designated in scientific pitch notation. While the 'normal' middle c is C4, the MIDI designation is C5, or note number 60, but both are the same pitch.

https://en.wikipedia.org/wiki/C_(musical_note)#Octave_nomenclature

[Tez]

C5 it is then... should of googled "The MIDI designation of middle c" & this explains why the sampled pitch .wav file names, for say a piano, differ by an octave.