MIDI Number to Note Converter

You are staring at a MIDI log, a .mid file in a hex editor, or a sampler manual, and the pitch is written as note 62 instead of a note name. Nobody memorizes all 128 numbers, and doing the division by twelve in your head breaks your concentration mid-session. Type the number and the note name with its octave shows up immediately, no button to press.

The math is short: the remainder of the number divided by 12 gives the pitch class (0 is C), and the integer part minus one gives the octave. That is why 60 comes out as C4, middle C. Here is the catch worth knowing: that is the scientific, Yamaha-style convention. Cubase, Ableton and most Roland gear label the exact same number as C3, one octave lower in name only.

Only sharps are listed, so you see A#3 and never Bb3 even when the score is written in flats, since it is the same key with a different spelling. Valid input runs from 0 (C-1) to 127 (G9); anything outside shows a dash, and decimals are rounded to the nearest whole number. The page shows no frequency in hertz and does not go from note name back to number. It runs locally.