Musical Keyboard Using ATMEGA8  This article aims at developing a Monophonic (Single note) musical keyboard by generating the musical notes frequencies using a microcontroller (ATMEGA8). The project presented in this article is a 12 Key, Monophonic keyboard with the options To shift between the Higher and lower octaves Play the programmed tunes Record and save new tune in real-time Frequencies of Musical Notes Taking the Piano as a view point, every key of a Piano has a unique frequency. The musical notes are named as: The frequencies of these notes on a Piano are provided in the following web page – https://en.wikipedia.org/wiki/Piano_key_frequencies . By knowing the frequency of a particular note from the frequency table, we can play the note using a microcontroller. There are 12 unique key notations as shown in the above image. The frequency of the note depends on the octave of the…