Tremshifter - Hum w/Tremolo

[Frank_Costanzas_Lawyer]

Howareyanow - Question for anyone that built out the DeadAstronaut Tremshifter... although I'm guessing this might apply to other similar lfo/vactrol cirtuits.

Just finished building one out and am really enjoying the unusual filter sounds you get with the tremolo. However the only problem (apart from blinding LED rate indicators) is the hum/buzz that I'm getting along with the rate of the tremolo. It does get quieter when you switch on the filter... more of a wooshy sort of sound there. Is there a way that I might be able to quiet that down a bit? I used a water clear 5mm blue for the Trem LFO in the vactrol, and a water clear green one for the Filter LFO. Not sure if perhaps using diffused LEDs would affect or not. It's almost like the hum you get with a flashing neon sign.

Thanks!