where do I solder LED for sound reactive?

[dfasfag]

Hi, where do you solder LEDs so that it would light up when a headphone is plugin to the headphone jack?  Is this possible, I thought I've seen a diagram of it somewhere here.  And maybe a way to make this sound reactive also?

Also how about the sound reactive mod, how do you wire it up without a chip?  If the leds are hooked up to internal speakers, it wont react when a headphone is plug in, would it?

I know how to solder and the resistance, and stuff but ive never really done any soldering on psp besides the basic led mod.
thx.

[GhoSt]

idk i think you would solder a lm386 to the headphone socket or imput and then wire on some 0603's but im not sure 

[wtfisausername]

Thx for the info, i try some stuff.

[SYSTEM aka (Cyberpyrot)]

for headphones dont use resistors