Used but in full working order. Bastl Instruments Cinnamon VCF State Variable Filter is a high-quality modular synthesiser unit designed for musicians and producers. With built-in effects and a synth type design, this Eurorack module by Bastl Instruments delivers advanced sound possibilities for creating unique and dynamic music. The Bastl Instruments Cinnamon VCF State Variable Filter is a versatile tool for sonic experimentation and innovation in the music production realm.