That's the only way I can think of, unless you have a small mixer you can run the laptop and the amp through.

I'm trying to get the music from my laptop to my guitar amp and then to headphones.

What I really should be doing is getting my guitar signal into my laptop.

Thanks for the slap in the head, friends!

you can patch the computer headphone jack to the mixer. USB IO is still the best bet.

I think the Behringer thingy is the solution I'm looking for.

I feel like I'm real close to figuring this thing out.

My headphone amp has an iPod-in and a guitar-in, and I can play and listen to both of those at the same time.

Can it be that easy? A patchcord from the laptop's headphone-out to the headphone amp's iPod-in?

Hmm...

What kind of headphone amp is it? That might be nicer than my fix below.

Good luck!!! I'm hoping to be doing a little home-PC jamming myself later tonight

Yeah, it's that easy as long as you have some way to adjust the two volumes so one doesn't completely dominate the other.

The sound control on my laptop has separate volume sliders for the mike input and the computer's streaming playback or CD.

So, i don't think you need anything that isn't already part of the operating system.

Good luck.

If so you could run an audio cable with 1/8" plug from the laptop to whatever type jack is on the amp. They plug your headphones or earbuds to the headphone jack. This would be a really good way as you would be able to control levels of the laptop. I'm assuming you want to play backing tracks on the computer while you play lead on the guitar.

I was thinking about the same problem. My amp does not have an AUX input and I was thinking about splitting right and left of the headphones with one side playing laptop and the other guitar. This would require building a box with 2 mono input jacks connect to a stereo jack for the headphones.

Specs: http://www.behringer.com/EN/Products/UCA202.aspx

29.99 on Amazon