The famous Linndrum LM-1 drum machine !
Here’s a selection of 3 free VSTi that try to emulate the sound of the LM-1.
1. JM-1 VST by Jun’s Factory
JM-1 Drum computer VST
Info & download : http://www.aaa-int.or.jp/jfactory/projects/VST/
A Synthedit creation with good quality samples. It’s Windows only and 32 bit.
There is a volume and a pan control for each element.