it doesnt have mic ...
No.
No
you don't use it
Yes. The Guitar hero mic is basically a Logitech USB mic. So, it works fine with Sing it! You can also use it with your PC if you get the urge.
Yes, if you have a receiver for it.
Yoy have to use external MIC .
Unfortunately I don't think you can. You might. But I've tried many on my Dell computer and it is much to small to fit in the Mic hole or the Headphone hole.
as i understand you question u want to record audio in you computer without mic. you can use stereo mix option
The mic is designed to pick up sound external to the computer. If you want to edit the external sound with music internal to the computer then you will need to use the software that best suits your needs
Connect a microphone into the microphone input on your computer. You can use an audio recording program to record your voice.
You can record video (which includes audios) on your ipod email the video to your email account and download on to your computer.
It's a personal computer for mobile use.
You will need to use your own digital voice recorder and then import the audio into the computer to put into iMovie. If you have a USB microphone you can plug that in to use. If the microphone has a jack plug you will need an adapter to connect the mic to a USB socket. The built in mic is not too bad it can be adjusted in the Input section of Sound in System Preferences.
it doesnt have mic ...
you would need to buy one seperatly. then on the back of the computer (were all the cords lead to) there should be a set of plugins that are about the size of a toothpick. get the cord of the mic and plug the end into the one with a picture of a mic by it. you should then be able to use it.
yes you need to have a controller to be able to use the mic. (you can use the mic on guitar hero 4 and upwards)