When you're playing ordinary music; does it sound darker/in a deeper tone than usual?
If it does, then you should check your speaker-settings, or the speakers themselves (provided your feeling like popping the laptop open

) - laptop speakers tend to be (atleast in some way) of lesser quality. I.e. they some times start to sound strange after a few years or so.
If the music plays just fine, then your microphone is likely to be the villain. Go ahead with Punkid's suggestion, check your microphone settings (this problem is likely caused by the "microphone playback"-setting if present).
Or try checking the microphone itself: (in some way

record a piece of music, save it to a USB-flashstick or CD or whatever suits you best, now try to play it in another computer.
Does your voice still sound male? If so, then the problem is certainly caused by your microphone (or your microphone settings).
Provided you know how to find those settings... it can be very tricky i.e. searching through the control-panel, and after audio-software that came as bloatware and so on.
Hope this helps!