How to Use a Digital FM Transmitter With an MP3 Player

How to Use a Digital FM Transmitter With an MP3 Player. Want to listen to your MP3 files while taking a road trip? You can play your MP3 files in the car by using a digital FM transmitter. The transmitter plugs into your MP3 player and transmits the files on your device through FM radio waves to the car's FM radio receiver. Here's how to use a digital FM transmitter with your MP3 player.

Step

Find out what kind of transmitter is compatible with your MP3 player. Your best bet is to find one that plugs into your player's audio output jack.

Step

Decide how complex you want your transmitter to be. Some transmitters broadcast at a preprogrammed frequency, while others allow you to change it. (Being able to change it gives you more flexibility in urban areas, where a preprogrammed frequency might be the same as or close to an existing station. This will cause interference.)

Step

Position your MP3 player close enough to the FM transmitter so that you can connect the two, but still control your MP3 player by hand.

Step

Position your FM transmitter close enough to the receiver (such as the car radio) so that the signal is clearly picked up by the transmitter.

Step

Tune your radio to the preprogrammed frequency, or the frequency you choose.

Step

Tune your transmitter to the same frequency (if it's not preprogrammed).

Step

Press "Play" on your MP3 player. Now your MP3 songs will play through the radio.