okay, thanks a lot guys, that was a really stupid thing to do, I will be more careful now!

Hi, I recently bought a brand new Alesis Micron, I tried to plug MP3 Player to the Audio In but there's no sound coming from the synth, so I tried Audio Out and it does work - what the h**l?? And the Audio Out also works well as an output when I plug my speakers into it! Is it supposed to do this? I...