piping my mp3 player into my amp to jam along?

[REGNAD]

i have been trying to mod my VJR with little success. i want to pipe mp3 audio through my amp along with my guitar, is there a pedal out there that i could do this with?

[Processaurus]

a simple resistive (passive) mixer will do fine, you can build a Y cord to plug into the amp input that the guitar has 10K resistor in series between it and the amp, and the mp3 player has a 100K resistor in series between it and the amp.  You can build the resistors right into the plug

That makes it so the low low impedance of the MP3 player doesn't kill the high impedance signal from the guitar.

[REGNAD]

i'll give it a shot!

[Processaurus]

Cool, actually, come to think of it you could sum both stereo sides of the MP3 player together (from the MP3 player's tip and ring connection) with 100K resistors to the amp's input, if you didn't want lose a channel.  Be good for Credence, where one channel is drums, lead guitar, and backup vocals, and the other is rythm guitar, bass and main vocals. 

[R.G.]

The devil makes me want to say this... 

That is a stock feature of the Workhorse Pony 30W combo amp. There's a 1/8th inch jack for a CD (or other audio player) on the panel. We piped it directly into the input to the power amp, not through the guitar preamp.

Works well for putting an amp emulator as a front end to a tube power section too.

[REGNAD]

thats what ive been trying to do on my amp, to bypass the preamp. i'm close but not quiet there.

[drewl]

Hey that's a great little feature there RG.
You find the "CD" inputs on alot of the newer cheapo solid state amps, but I don't think I've seen any boutique amps with that.
No wonder everone wants you to build more of them