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c#midimidi-instrument

What is the proper octave value of Middle C (Piano), in MIDI representation?

I am currently developing an Optical Music Manuscript Reading application in C#. For the note identifcation scenario, I have found out the need of knowing the octave values for each key.

Because of represnting thie note as in example: 4C4 where (Duration)(Note)(Octave) is the order of represntation.

(Considering the Treble Clef only)

In which octave is middle C, in MIDI notation?

Middle C

In which octave is the C in the below image is?

C most right next to Middle C

Solution

  • It's usually C3, but as Codeguy007 noted, it can vary from software to software. In my experience C3 is the most common value for middle C.