It basically consists of a MT-32-compatible Roland CM-32L and a MPU-401 unit, integrated onto a single full-length 8-bit ISA card.

In addition to normal Roland dealers aimed at musicians, it was distributed in the United States by Sierra On-Line in 1989 for use with the company's games.

Sierra On-Line was instrumental in working with Roland Corporation in introducing high-end sound modules and sound cards in the mainstream computer game market in the late 1980s through early 1990s.

A model called the LAPC-N was also released for the Japanese NEC PC-98 system.

Further evidence can be found in the owners manual which mentions the LAPC-I and also MCB-1, clearly showing specific use of I instead of 1.