Swapping an LED/LDR with a transistor?

[scoop]

I'm about to build a 4ms stereo panneur (tremulus lune), I love the idea and design of the pedal except I'm worried the LED/LDR combo doesn't give me very sharp percussive waveforms. Is that true? Is there some daughter board I could build to replace this?

[tabbycat]

hey scoop,

this is what i've used for a similar thing.

layout @ gfx
http://guitar-fx-layouts.42897.x6.nabbl ... on_LFO.png

thread
http://guitar-fx-layouts.42897.x6.nabbl ... 26570.html