The JD-990 is a sound module that has the same great sounds, effects, and
programming flexibility as the JD-800. It contains a few additional features
such as more internal ROM samples, SR-JV80 expansion board compatibility, more
flexible multitimbral capabilities, and compatibility with sounds designed for
both the JD-800 and JV-series of instruments. The JD-990 has a few more editing
parameters than the JD-800, such as structures and FXM. You can even control
most of the editing parameters on the JD-990 from the knobs and sliders on the
JD-800.
programming flexibility as the JD-800. It contains a few additional features
such as more internal ROM samples, SR-JV80 expansion board compatibility, more
flexible multitimbral capabilities, and compatibility with sounds designed for
both the JD-800 and JV-series of instruments. The JD-990 has a few more editing
parameters than the JD-800, such as structures and FXM. You can even control
most of the editing parameters on the JD-990 from the knobs and sliders on the
JD-800.