Purchase a computer-to-guitar cable from a local music store. This cable has a 1/4 inch connector on one side and a 1/8 inch connector on the other. The 1/8 inch connector fits a standard headphone jack. Connect this cable to the input of your sound card. Open your audio editing program and simply press the record button and begin playing to record your music. You can use a free audio editor, such as Audacity, or purchase a program, such as Sonar or Cubase, to record.
The acoustic guitar is more difficult and requires the purchase of two microphones and two microphone stands. The first microphone needs to be adjusted so that it is level with the guitar neck and pointing directly at approximately fret No. 12. The other microphone should be directed at the center of the bridge. Ensure that the microphones are at least 2 feet apart from each other and 6 to 9 inches from the strings. If you place the mic too close, it will not capture the entire sound of the guitar. Too far away and the sound will be muffled.
Set one microphone stand to hold the first microphone approximately 4 feet in the air. This microphone should point directly at the bridge but from above instead of facing the bridge head-on. The microphone should be approximately 6 to 9 inches from the body of the guitar. Place the second microphone in the same position as in the horizontal pairing. Point the head of the microphone directly at fret No. 12. The microphone should be horizontal to the ground.
Place two microphones directly in front of fret No. 12. Position them so that the heads of the microphone are almost touching and the back of the microphone is facing outward. If you have done this correctly, the microphones will make a V-shape, with the two heads pointing straight at the guitar. Start with the microphones placed 1 foot from fret No. 12. Push the microphones back farther as needed to get the sound that is most appealing to you. This is the easiest technique to ensure a good quality recording.