The Yamaha CX5M, commonly known as the Yamaha Music Computer, was a home computer based on the MSX standard, released in 1984.

MSX was a computing standard jointly developed by Microsoft, the ASCII Corportion, and several Japanese electronics manufactures. The aim was to create a unified standard that could be shared by manufacturers and developers across the computing industury. In the early 1980's many home computers utilized variations on the Microsft BASIC programing language; however, the specific software implementations and the hardware were not compatible across manufactures.

The system saw limited success in North America where companies such as Apple, Atari, Commodore, and IBM dominated. However, MSX computers became very popular in Japan with manufactures including Casio, Misubishi, Panasonic, Pioneer, Philips, Sharp, Sanyo, Sony, and Yamaha. Before the Famicom became Japan's dominant gaming platform, major studios including Konami and Hudson Soft developed for MSX. Notable titles that launched on MSX include Metal Gear and Bomberman.

The Yamaha Music Computer was one of the few MSX systems sold in America. The computer had a built in FM Synthesizer and an optional piano keyboard. It was marketed specifically for music and sound production, a sector where Yamaha excelled, setting it apart from the general-purpose computers of the era.