MIDI stands for Musical Instrument Digital Interface. It is a protocol to transfer controlling data in a musical context. MIDI-Controllers appear in forms of keys, wheels, faders, pads and sensors. The protocol contains information about pitch or velocity, which is stored in a 7 bit system. There are hence 128 (0 – 127) different values for these parameters. If you like to know what MIDI can be useful for read my article Jazz-Blues-Generator. I have used MIDI and Max/MSP to build a tool that automatically plays jazz blues standards with a solo in the fitting scale.

Below, you see a table that shows MIDI note number 21 up to 108 with the corresponding note name in English and German notation. I also added frequency, wavelength and some extras to it. Use it as a reference whenever you like.