Perhaps this is one of the most misunderstoood and under appreciated synthesizer Yamaha has ever built. If FM syntesis is complicated and hard to carry out with just 6 operators, let's imagine what might happen with 8 voiced and 8 unvoiced operators. FS1R is a real power, but almost impossible to operate with its tiny display. Formant synthesis is a great thing, useful to create particular sound textures impossible to reproduce with other synth engines. Without an editor with graphical interface FS1R can't be managed. Period.