I did something on my Mini-B project that does that. Using a 1watt amplifier tied into the sound board.

Sound servo will change the brightness of a lamp connected to it depending on the PC sound, I was using it for my hearoids mouth at one point to flicker with voice synth.

I guess you could use it to trigger a Larson scanner (knight rider light) with it.

If you want to power something too big for the EZ-B,

   this (Link)

is what I bought for my B9 chest light. I did not go with the real neon. I used two amber truck LEDs
along with half a dozen little red side marker lights. They are all behind acrylic tubing to simulate neon.
I am getting off track here, but the point is that I have a lot of light running off of the MK114 and it works fine. It was cheap to buy and easy to put together.

No, I want it to synchronize the voice spoken with the chest LED's. not, like KIT. I meant just to be able to do it with inputing an audio signal into one of the ports of the EZB and then having the port blink the audio to an LED. I said KIT, but I meant voice synch. sorry. I know I can do it with hardware, but I am a little low of cash right now.

Thanks everyone for their comments.

:P

Try sound servo under servos in the add controls. It adjusts the PWM so will increase the brightness of the lamp/LED according to the sound. No extra hardware required. Give it a whirl and see if it does what you want it to do. It looked pretty good in my robots mouth before I replaced it for the Larson scanner and brain.

Thank You, Rich. That is what I was looking for.

someone just posted something where he wired leds in parallel to the speaker with a resistor, seemed to work well, although the sound servo sounds easier. i guess it would save you a port though

I use a 3 of these to give sound to light ,as my sound is generated from the mp3 trigger card its possible to vary the level using preset resistor on card