The original Melody-M accordion microphone system came in three different models to accommodate different sizes and types of accordions. The goal of this project was to design an internal microphone system that can amplify an accordion seamlessly for the player. Working closely with Acoustas Co. and accordion players we designed a system that sounds true to the instrument. It is easy to install and can fit into most accordions. The installation of this microphone is done by an accordion repair person with detailed instructions to get the best possible sound. The Melody-M sold hundreds of units in over 18 countries before it was updated to the newer version.