Clues are on the board to the left. Knock papers off. Settings to solve the fourth puzzle: x1-66: L and R both in the middle 5246-k: Slider and knob both all the way to the right CP 547: Slider in middle, dial at 2nd notch from left J&E 801: 2nd set of numbers from left 🎵L75: Dial almost at 4th notch, select bottom left note with 1 flag See images for more help.