15. When using Line In/Mic In to record audio, it seems to work fine, but nothing is there when I play it back.

Most likely, your Windows Recording Control is not set up properly. You have to tell Windows what device(s) you are recording from. To do this, follow these steps:

1. Launch the VU Meters by going to the Window menu and clicking on 'Show VU Meters'.
2. Click on the Speaker Icon found in between the Input and Output VU meters.
3. Select the desired input (Mic, Line In, etc...) and set the respective recording level.
4. To ensure that you have connected properly, play a note from your instrument, or sing a couple of notes into the Microphone. Monitor the Input VU meter for a signal.

Note: You can also launch the Record Control window by doing the following:

1. Double click on the little speaker in your System tray (right next to the clock on your desktop), or go to Start | Programs | Accessories | Entertainment | Volume Control. You should now see the Play Control Window.
2. Go to the Options Menu and select Properties.
3. Select Recording, then press OK. This will bring up the Record Control Window.

If you are plugging a microphone into the mic-in on your sound card and are having trouble recording, even though "mic" is selected in the Record Control window, this is probably a limitation of the microphone jack on your computer. On most computers, the microphone jack is intended for computer mics, not music mics. The solution is to plug your microphone into a pre-amp or mixer, and use a Line level out to Line-in on your sound card.