One UART0 TX fans to 3 identical TRS-A output jacks (J4/J5/J6) via a shared MIDI_TX node — a hardwired MIDI-thru splitter for cabling convenience, no per-jack channel separation. Refdes cascade: CV outs shift J5-J8 -> J7-J10, keypad header J9 -> J11. BOM jack count 6 -> 8.