If you were around in the late 1980s and early 1990s you may
remember Cesium Sound full page ads in Keyboard and EM, or
you may have gotten a famous "blue flyer".
Sound libraries are stll available on Sysex disks for
ESQ-1, SQ-80, TX81Z, D-50, D-550, VFX, VFXSD, SD-1,
Programmable cartridges are available for the VFX, VFXSD
and SD-1 but no other cards or carts.
Also sounds for Wavestation, 01/W, SY-85 and JD-990.