For Tremulus Lune, Panneur, Phaseur, and other LFO-based effects
One SPDT stompswitch chooses between two preset speeds.
Add one potentiometer for the new speed control. Disconnect the fine 2 end of the wire which runs between fine 2 and the board, and reconnect that end to the center post of the SPDT. Now, install a new wire from fine 2 to one of the outer posts of the SPDT. Next, install a wire from new speed 1 to the remaining post on the SPDT. Finally, install a wire from new speed 2 to speed 2. (Speed 2 will now have two wires; one going to the board, the other going to new speed 2.)
Diagram soon.
[Edit] You has SPST down, I changed it so SPDT for you
Thanks. -doug
For any aux LFO
Pretty simple. One aux LFO in parallel with, and speed-modding to, the main LFO. Main LFO speeds up with volume. (Or slows down, if inverted.)
Speed-modding LED requires a Height control– a 1K or 2K parallel pot.
So three total new controls: aux speed (10K or 100K, depending), aux depth (1K or 100K, depending), and aux Height (sets top speed; 1K or 2K, whichever works best.)