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If we’re honest, there aren’t a whole lot of accessories coming out for the MSX computer line this holiday period. There is, however, a new sound expansion cartridge for the diehard fans out there, thanks to [Ricardo Suzuki].

It’s called the Misato MSX, and it’s a cartridge you can build yourself to give your computer a grander set of sound capabilities than it ever had before. At the heart of the cartridge lies the Yamaha YMF288, an OPN3 chip that offered three Software Sound Generator (SSG) channels, six FM channels, and six rhythm channels. Paired with a decent DAC chip, it provides deliciously rich synthesized sound very characteristic of that 1980s/1990s FM synthesis era. The cart can be used for play of a wide variety of OPN music, or creating your own compositions with the right software tools.…