jbeweb 0 Newbie Poster

Ok I have searched everywhere and tried everything to make it where I can hear myself live through my computer speakers but Im starting to think there is no solution. I have a HP Touchsmart IQ504 with Soundmax Integrated Digital HD Audio. I don't see a microphone option on my playback devices. I only see it under recording devices and it works to record my voice but I want to be able to sing karaoke. Can anyone help me with this problem? If not is there something I can buy from the store to make this work. I have tried both logitech usb microphone and a line in 3.5 mm line in microphone with no luck.