Roland D-10 Digital Linear Arithmetic (LA) Synthesizer Keyboard (w/ Original Case)Roland D 10 Digital Linear Arithmetic Synthesizer Sure to be a future classic, the Roland D 10 Linear Arithmetic (LA) Synthesizer was released in 1988, though you may be fooled into thinking this is a modern synthesizer due to its sharp lines and dark, all metal chassis. The D 10 borrows the sound engine from the formidable Roland D 50, but with slightly more streamlined functionality. In a nutshell, LA synthesis refers to combining traditional