BackPrecision ADSR with retriggering and looping modifications * Bourns PTL series, such as: https://www.mouser.com/ProductDetail/Bourns/PTL30-15O0-105A2?qs=fV9UsjselOEqdQiKFAm%2Fog%3D%3D (A1M, orange LED, 30mm travel, 15mm shaft ** https://www.digikey.com/en/products/detail/bourns-inc/PTL30-15R0-103B1/3781301 (red B10K) and https://www.digikey.com/en/products/detail/bourns-inc/PTL30-15O0-105A2/7314942 (orange A1M * The SPDT toggle switches eea453f1eeea3c7619b9825ab723148f1dab934e Port in fixes from v1.1 Checkpoint after re-centering sliders, before removing redundant LED resistors next to transistors to save on panel wires 2eebdf7ecf Add four more switches/buttons, move LED drivers onto PCB .../Unseen Servant/Unseen Servant.kicad_pcb | 3143 .../Unseen Servant/Unseen Servant.kicad_sch | 1279 Notes on needed revisions from revision 1: **Corrected:** Fix silkscreen misalignment for lower three knobs Corrected: Shifted C5 so one of its pins does not cure such failure in a circle. Used.