hello friends, it is the first time i write in the forum about a problem, but the truth, no longer know how to fix, and i need your help.
I built version 2 of Equinox and the effect works, i can hear, but behind it there is an annoying noise increases as you turn the knob, i have reviewed all possible errors, like a bad solder, bridges between tracks, error component values, etc., but the truth is that everything is as it should, also review the sections of LPF and LFF but all this as shown in the diagram; i experimented with several PT2399 but i get the same result, also to make sure change the TL072, but nothing changes.
I have always this annoying background noise, i leave a sample video and photos of the pcb.
Check the voltages of the PT2399 but i didn't see nothing unusual, got voltages between 5 and 2.5 volts in the respective pin as usual, if you need more details of these let me know.
I've been already 3 days trying to make it sound as it should be but the truth is i don't know what the F...!!! is wrong!
As a last comment i inform you that i made a bridge in the JFET to test the pedal and this always on, but do not think this is the problem, since the "clean" signal sounds perfect, the problem is when the signal is incorporated with the effect
perhaps the picture is somewhat deceptive, but I assure you there are no bridges between tracks

