One thing everyone seems to agree on unambiguously is that middle C is MIDI note number 60. So why is Cakewalk using C5? Can this be overridden anywhere? So, it seems there is a defacto standard of calling middle C either C4 or C3, with C4 appearing more common. In addition, most of the sample libraries I looked at with WAV files had middle C with a filename using either C4 or C3. the article above says 'A4 refers to the A above middle C'). However, the same article - and most other acticles I found on the web - refer to middle C as C4 (e.g. For instance, traditional pitch class notation, Japanese MIDI specs and American MIDI specs may specify dissimilar ordinals for middle C (C3 vs. 'there is no one standard which correlates any particular octave number to a specific frequency range. I did a bit of research on Wikipedia - this notation (which Sonar calls 'diatonic') is apparently also known as 'Scientific Pitch Notation':

Why is it that if I play middle C on my piano, it shows up as note C5 in Sonar - but when I trigger VSampler from Sonar, VSampler registers the same note as C3! Which is correct?

C5 midi note number