The Prism Circuits TKB (Touch-Activated Keyboard Sequencer) is a 16-stage, four-row control voltage and pulse generator built around capacitive touch sensing. Each stage provides independent CV and gate outputs, enabling complex sequencing, manual step addressing, transposition, and real-time performance control. Originally designed by Serge Tcherepnin in the 1970s, the TKB is prized for its immediacy, flexibility, and deep integration with modular patch-programming systems—making it a powerful centerpiece for expressive, hands-on synthesis.