Hi everyone! Some time has passed since you all discussed this but I hope you can help 
I have done the circuit as shown in the video and supplying with the 12V turns on the LED, so I think it is done correctly.
But i can’t get the audio right…When i “connect it” to the speaker, I can only hear noise like when you touch the aux cable with your fingers with the speakers on.
I wrote “connect” because I can’t quite understand how to do it, so I haven’t soldered anything yet, and I’m just touching the cables I think I need to.
So what I need to ask is how to “plug” it correctly so I can hear it. Why is there only 1 “OUT”? Shouldn’t I need a ground too? I bought a TS (female) audio jack to which I connect a cable directly to the speakers. How do I use it?
Btw I tried “connecting” the OUT (loose red cable) and a GND (loose white cable) to the Tip and Sleeve pins, and the LED shuts or I hear noise like i mentioned
