Testing with a CD Player

   1.

Check that your CD is physically connected to your sound card.

• Open your computer and find the back of the CD player.
• If there is a wire connecting the Audio Out CD port with the sound card, you can record audio data from your CD. If there is no wire connecting your CD and sound card, you must use the microphone to record data.

   2.

Put an audio CD into your CD player. The Microsoft CD Player should automatically be invoked and begin playing the CD. If this doesn't occur, then you must invoke this program yourself:

Start>Programs>Accessories>Multimedia>CD Player

The figure below shows how to play a CD with the CD Player program.

   3.

While the CD is playing, record audio data by selecting the Sound Recorder's Record button. While recording, the green line in the Sound Recorder should not be flat-lining. If everything has worked, then the A/D subsystem on your sound card is working properly. Note that the CD player performs a
D/A conversion on the audio data. Therefore, the CD sends analog data to the sound card.

   4.

After recording the audio data, save it to disk. The data is automatically saved as a WAV file.

   5.

Play the saved WAV file. While playing back, the green line in the Sound Recorder should not be flat-lining. If everything has worked, then the D/A subsystem on your sound card is working properly.