Green Ringer bad cap or grounding issues?

[CaioAllures]

Hello! Got a somewhat working Green Ringer, apart from a very bizarre noise:

http://yourlisten.com/CaioAllures/humandbuzz

I KNOW it's debugging, but I've already crossed everything, have already did all solders again and touched every single thingie to catch that noise up... I sense it's something about the capacitor C5 on GGG schematic or the low gain transistor. Any guesses? Thanks a lot

For further references> http://www.generalguitargadgets.com/effects-projects/octave/dan-armstrong-green-ringer/

[garcho]

How are you building this? PCB, etch, vero, perf, P2P, hot glue...?

http://yourlisten.com/CaioAllures/humandbuzz

Good on ya, but link isn't working

I KNOW it's debugging... ...touched every single thingie to catch that noise up

I don't understand this, might be language barrier; can you explain what you've checked? You've left out just about the most important thing which is to post voltages. Do you have a voltmeter (multimeter)? Keep in mind, the reason we always bring up the debugging page is because it WORKS not because we wanna be jerks. Rhymes even.

I sense it's something about the capacitor C5 on GGG schematic or the low gain transistor

Why?
C5 on the GGG schemo is the output coupling cap, fairly straight ahead as far as layout and circuitry is concerned. Unless there is a short or cold joint here not much can "go wrong".
Why suspect the low gain transistor? It's a 3906, just about the most common PNP BJT, and not that particularly low gain, either.
Did you double, triple, quadruple check your transistor orientation to make sure the right pins are in the right place?