Right now I just play the songs I wanna play along to thru the stereo, match the levels with the amp and play along. But i'd like to play my MP3 and bass thru the amp (like many of you with the proper equipment already do) that way I can use headphones and simplify my process. But I only have the one input on my amp. Is there an adapter out there with a 1/4" and 3.5mm female on the same plug? If so, will plugging both in at the same time even work? I appreciate any help, and ideas.