These LM-1 EPROM images come to us courtesy of Rohan Mansell. Here's what he had to say about them:

LINN ELECTRONICS INC "LM-1 DRUM COMPUTER" sound EPROM binary image files. These EPROM image files are exact copies of the factory sound set that was "commonly" installed into a LINN ELECTRONICS INC "LM-1 DRUM COMPUTER". "Commonly" is a reference to most LM1-E2 DRUMS BOARDS having a RIMSHOT sound EPROM installed where the circuit board label indicates that a "CLAV" would be present. (The circuit diagrams also make reference to a "CLAV"). A few VERY early pre "360-SYSTEMS" manufactured "LM-1 DRUM COMPUTERS" have a front panel trigger button that says "CLAV" where later units were labled "RIMSHOT". To make this factory soundset complete it would be great if the original "CLAV" sound EPROM could be retrieved for inclusion with these files. 

For your convenience, I have included a combined 4096 byte file for each of the double EPROM sounds, suitable for burning onto a 2732 EPROM, in addition to the individual 2716 (2048 byte) files.