I have a Shure SM58 connected to my computer through a Tascam US122 audio/midi interface (in my usb port), and I was wondering if it's possible to use the speakers to amplify whenever I sing or talk into the mic or whatever. Cause my friend has a simple 5$ mic at his house plugged directly into his onboard soundcard, and when he sets his volume really high (and has microphone said to play in the volume control panel thingy) his voice comes out of the speakers amplified. It's really handy for like, practising and stuff. But for some reason I can't get it to work with my setup... Help? Btw I'm using WinXP (with SP2), and my soundcard is a Creative Soundblaster Audigy 2 ZS, if it matters.