Roland LAPC-I (1988)
The LAPC-I was an internal version of the earlier Roland MT-32 MIDI synthesizer module reduced onto a single ISA card that fit into a PC. It played up to 32 voices simultaneously in stereo using linear arithmetic synthesis, a method that utilized instrument samples modified electronically to produce a very realistic result. For a time, Sierra On-Line distributed the LAPC-I for use with its games, but its high price (around $425) limited its adoption.